AdminAlex (CEO / Founder, GroupFabric)

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  1. 78 votes
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    5 comments  ·  General  ·  Flag idea as inappropriate…  ·  Admin →
    AdminAlex (CEO / Founder, GroupFabric) commented  · 

    Couple things at play here:

    1. In October Microsoft banned on-device mining in Store apps. This means Bitcoin Miner can only do cloud mining where GroupFabric runs the miners.
    2. CloudMining has GroupFabric pay the power and infrastructure costs; these costs have to be supported by ads.
    3. Ads require foreground focus.

    We're working on a new version that doesn't require the Microsoft Store. This version will have an option for no ads in exchange for a % of what is mined. When running without ads, it will also work in the background.

  2. 193 votes
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    5 comments  ·  General  ·  Flag idea as inappropriate…  ·  Admin →
    AdminAlex (CEO / Founder, GroupFabric) commented  · 

    We'd love to do this, but Microsoft recently changed their policy to ban on-device mining back in October. Here's a link to their policy changes: https://docs.microsoft.com/en-us/windows/uwp/publish/store-policies-change-history

    Basically the only people who would be able to mine would be those with rooted Xboxes or developer licenses that allow side loading. Doesn't mean it won't happen, but with Microsoft's current policy it's hard to make a user-friendly product.

  3. 1 vote
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    1 comment  ·  General  ·  Flag idea as inappropriate…  ·  Admin →
    AdminAlex (CEO / Founder, GroupFabric) commented  · 

    Microsoft unfortunately doesn't allow on-device mining in Microsoft Store apps, so the ads actually are paying for cloud miners which GroupFabric runs. I.e. the mining isn't performed on your machine - GroupFabric is running the miners already on your behalf.

    The ads are what pay our power and infrastructure costs which is why the loss of ads is bad for yields. We're working on moving Bitcoin Miner off of the Microsoft Store so users will be able to mine using their own machines.

    Once users are mining on their own machines, we'll be able to offer a no-ads option in exchange for a fee % of what is mined as mentioned here.

  4. 5 votes
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    1 comment  ·  General  ·  Flag idea as inappropriate…  ·  Admin →
    AdminAlex (CEO / Founder, GroupFabric) commented  · 

    It's on the roadmap, right now we're working on a non-Microsoft Store version. After that we'll look at add-ons for Android and iOS.

  5. 19 votes
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    5 comments  ·  General  ·  Flag idea as inappropriate…  ·  Admin →
    AdminAlex (CEO / Founder, GroupFabric) commented  · 

    Most of these stats a fairly standard for miners - but here's some general info:

    As to what are shares – shares are completed units of work that have been submitted to the mining pool. The higher the difficulty a share was mined at, the more the share is worth. The mining pool automatically calibrates difficulty so your miner finds one around every 30 seconds. Higher hash rate miners can solve higher difficulty shares and consequently have higher yields.

    Errors are when you miner submits a share and the pool cannot validate or redeem it. Reasons for this can be if there is a mathematic error in the share (sometimes an indicator of a hardware issue but this is rare). More commonly, errors happen when a work item that the miner was working on goes stale and is replaced by a newer work item. Bitcoin Miner is designed to submit the old share just in case it can be redeemed, but in these situations errors nothing to worry about. Generally they happen when work items change quickly such as when the pool and miner haven’t settled into a steady state and the difficulty is changing.

  6. 4 votes
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    1 comment  ·  General  ·  Flag idea as inappropriate…  ·  Admin →
    AdminAlex (CEO / Founder, GroupFabric) commented  · 

    Thanks for the support! Microsoft was a good partner while it lasted - but nothing lasts for ever. We're going to try to keep yields as high as we can until the new miner is out.

  7. 1,037 votes
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    102 comments  ·  General  ·  Flag idea as inappropriate…  ·  Admin →
    AdminAlex (CEO / Founder, GroupFabric) commented  · 

    Wallet ids and addresses are issued by the Bitcoin wallet you decide to use. https://www.blockchain.com/ is one option if you need a wallet.

    AdminAlex (CEO / Founder, GroupFabric) commented  · 

    Mining add-on is ~40% complete; we hope to make faster progress over the next couple months given the holidays are now past.

    AdminAlex (CEO / Founder, GroupFabric) commented  · 

    Reposting this information due to some confusiuon:

    We had to temporarily replace on-device CPU and GPU mining with cloud mining. The change wasn't our choice. Microsoft changed their policy to ban on-device mining in Microsoft Store apps and gave us 15 days to replace it with cloud mining or be de-listed. We're working on a new add-on package to restore on-device mining that will be available through our website.

    Here's a link to the Microsoft policy change: https://docs.microsoft.com/en-us/windows/uwp/publish/store-policies-change-history

    Here’s some more information we posted on our site: https://www.groupfabric.com/bitcoin-miner/major-changes/

    The current cloud miners should still be able to generate around 500-700 Satoshis per day.

    Our choices were:

    1. If we did nothing, Bitcoin Miner would have stopped working for everyone on October 31st.
    2. Temporarily replace on-device mining with cloud mining until an on-device mining add-on can be developed, Bitcoin Miner keeps working at a hash rate close to Power Saving mode.

    We're working non-stop to finish the on-device mining add-on. The cloud mining change was the best we could do before the October 31st deadline. While the free cloud mining costs us money to operate, it is the right thing to do for users.

    AdminAlex (CEO / Founder, GroupFabric) commented  · 

    Right now Microsoft Store apps are not allowed to access temperature sensors - this is because Microsoft hasn't standardized how to get this information and doing so requires accessing vendor specific driver interfaces which isn't allowed on the Microsoft Store.

    What is possible is adding in manual CPU/GPU % controls, time-based controls, or user-idle/active based controls. We do want to implement these types of features but feel that user profitability still needs to take highest priority which is what we're working on right now. Once we improve user profitability, we want to continue to focus on quality improvements like these.

    AdminAlex (CEO / Founder, GroupFabric) commented  · 

    We do care and are have this work scheduled, we're just a small engineering and are working on improving user yields first which is a huge amount of work to do.

    AdminAlex (CEO / Founder, GroupFabric) commented  · 

    The initial hash rate spike happens only in Power Saving mode because Bitcoin Miner is determining the performance capabilities of your hardware to find the best yield while minimizing power use.

    AdminAlex (CEO / Founder, GroupFabric) commented  · 

    On Charle's comment - you can actually verify Bitcoin Miner is performing as advertised using a network trace tool or the built in Trace View for analysis.

    AdminAlex (CEO / Founder, GroupFabric) commented  · 

    We haven't made any performance changes to the core mining algorithms - the only thing I can think of that would negatively affect performance might driver updates.

    It's also possible that some of recent fixes for Spectre and Meltdown from Intel and MSFT may have affected mining on some machines, but that seems unlikely.

    AdminAlex (CEO / Founder, GroupFabric) commented  · 

    The only time the Bitcoin Miner should try to use your camera is if you click the scan button in the Payout Address screen (so the app can scan in a payout address QR code).

    If it is at any other time, we recommend immediately denying any camera permission dialogs.

    Likely it’s because a bad advertisement on Microsoft’s advertising network – we have a thread going with Microsoft right now over why their ad network is delivering ads that are requesting this permission.

    Another option is to deny the camera permission to Bitcoin Miner in the Windows 10 Settings –

    1. Start Menu
    2. Search for Settings
    3. Find A Setting -> Camera Privacy Settings
    4. Bitcoin Miner -> Off

    This will disable the QR code scanning functionality in the Payout Address screen, but is probably the best workaround until we can get a fix from Microsoft.

    Mining performance was also partially degraded over the past week due to connectivity issues, but we implemented several fixes over the weekend that should boost overall yields. Even at low hash rates users should be able to mine 300-500 Satoshis/day at the moment.

    AdminAlex (CEO / Founder, GroupFabric) commented  · 

    Definitely disable SLI/Crossfire when mining - GPU drivers don't correctly distribute compute workloads in SLI. When in SLI the GPU driver "fools" the application by only showing one virtual GPU, but then you're relying on the GPU driver to correctly distribute mining workloads which they don't.

    AdminAlex (CEO / Founder, GroupFabric) commented  · 

    CUDA and OpenCL are tricky to have directly because Microsoft will not certify apps that use these functions right now (only DirectX is allowed). We'd certainly like to use both CUDA/OpenCL and are investigation other ways we could get something similar done.

    AdminAlex (CEO / Founder, GroupFabric) commented  · 

    Waleed - please file a support ticket - this forum is for feature requests.

    AdminAlex (CEO / Founder, GroupFabric) commented  · 

    If the GPU driver crashes - unfortunately it's exactly that - a bug in the GPU driver. That said, sometimes GPUs will crash if they have insufficient cooling, but both AMD and nVidia drivers do let you see the driver status in their control panels.

    AdminAlex (CEO / Founder, GroupFabric) commented  · 

    Hi Michal, all of our Windows Store miners use DirectCompute (DirectX) when GPU mining.

    Unfortunately Microsoft has not certified any OpenCL or CUDA libraries for use in the Windows Store. This means if an app were to use OpenCL or CUDA, it would not pass certification for release on the Windows Store.

    AdminAlex (CEO / Founder, GroupFabric) commented  · 

    Hopefully some time in the next 3 months - right now most of the work is going into a Litecoin version as well as ASIC support.

    AdminAlex (CEO / Founder, GroupFabric) commented  · 

    Right now Bitcoin Miner doesn't show stats or controls on a per-device basis, but I'm looking into adding this sometime in the next couple versions (both controls and info).

    AdminAlex (CEO / Founder, GroupFabric) shared this idea  · 
  8. 93 votes
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    13 comments  ·  General  ·  Flag idea as inappropriate…  ·  Admin →
    AdminAlex (CEO / Founder, GroupFabric) commented  · 

    We're probably ~40% complete on the mining add-on (since November when we were forced to switch to cloud mining); we hope to make faster progress over the next couple months as the holidays are now done.

    AdminAlex (CEO / Founder, GroupFabric) commented  · 

    Over the next couple weeks we hope to have the Cloud Mining hash rate improve as optimizations get made.

    Probably end of January or mid-February for the add-on as it will contain new mining engines as well.

    AdminAlex (CEO / Founder, GroupFabric) commented  · 

    We're working on it. Microsoft changed their policy to ban on-device mining (both CPU and GPU) in Microsoft Store apps and gave us 15 days to replace it with cloud mining or be de-listed. We're working on a new add-on package to restore on-device mining that will be available through our website. Here's a link to the Microsoft policy change:

    https://docs.microsoft.com/en-us/windows/uwp/publish/store-policies-change-history

    Our only choices were:

    1. If we did nothing, Bitcoin Miner stops working for everyone on October 31st.
    2. Temporarily replace on-device mining with cloud mining until an on-device mining add-on can be developed, Bitcoin Miner keeps working at a hash rate close to Power Saving mode.

    We're working non-stop to finish the on-device mining add-on. The cloud mining change was the best we could do before the October 31st deadline. While the free cloud mining costs us money to operate, it is the right thing to do for users.

  9. 16 votes
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    2 comments  ·  General  ·  Flag idea as inappropriate…  ·  Admin →
    AdminAlex (CEO / Founder, GroupFabric) commented  · 

    We are working on it. Microsoft's policy changes are outside our control but we are doing our best.

  10. 0 votes
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    2 comments  ·  General  ·  Flag idea as inappropriate…  ·  Admin →
    AdminAlex (CEO / Founder, GroupFabric) commented  · 

    The default pool in Bitcoin Miner is actually a multi-pool, where it has your devices mine whatever should get you the best yield that the miner supports, and then converts it over to Bitcoin. This is a fairly complex process as right now the pool pays per share, which means the pool carries all of the risk associated with crediting users up front in Bitcoin for underlying work performed in other currencies (exchange rate risk, risk when the pool has to issue payouts for credited shares when blocks haven't been found yet etc.). Listing found blocks in underlying currencies would be tricky, as it wouldn't have much meaning since blocks found in alt-coin X wouldn't make sense if your miner was mining alt-coin Y. There are several fairly complex calculations in this, but turning it into a user-friendly format that people can make assumptions against is fairly hard since it's tricky to show clearly:
    1. How to correctly calculate the spot value of a share
    2. Adjust #1 for exchange rate risk (see futures pricing)
    3. Adjust #1 and #2 for any exchange fees the pool incurs
    4. Do 1-3 on a per-share bases that is unique to each users based on their hardware configuration.

    This is very different from most "dumb" pools where you only get paid in currency X if you're mining currency X, and only if the pool finds a block in currency X.

    On GroupFabric's pool, you get paid in currency X, when you miner could be mining currencies A-Z, and are being credited in currency X regardless of whether a block has been found in currencies A-Z.

  11. 17 votes
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    9 comments  ·  General  ·  Flag idea as inappropriate…  ·  Admin →
    AdminAlex (CEO / Founder, GroupFabric) commented  · 

    Yes - currently am working on the messaging code paths between the add-on and the Microsoft Store app. We have to make sure these code paths are secure since the add-on has to allow remote miner control to be compliant with Microsoft Store requirements (i.e. preventing hackers from trying to steal mining power). Am also working on adding features like:
    1. Auto restart in the event of a crash when mining
    2. Fixing audio mute functionality
    3. Having an always-on-top mode
    4. Integrating better mining engines

    AdminAlex (CEO / Founder, GroupFabric) commented  · 

    We're still working on it - in the meanwhile we were able to add a bit more hashing power to the cloud, so the cloud miners should be averaging ~20KH/s per client now which is around a 5% yield increase from before.

    AdminAlex (CEO / Founder, GroupFabric) commented  · 

    We're working on it. This change wasn't our choice. Here's the timeline of what happened:

    October 1st - Microsoft updated their store policy to ban on-device cryptocurrency mining in apps.

    https://docs.microsoft.com/en-us/windows/uwp/publish/store-policies-change-history

    October 15th - Microsoft notified us of these changes and gave us until October 31st to change Bitcoin Miner or have it removed.

    October 16-27th - GroupFabric drops everything to re-design Bitcoin Miner to prevent Bitcoin Miner from being deactivated, as well as provide a pathway to restore on-device mining in the future.

    October 29th - Bitcoin Miner 1.59 gets recertified by Microsoft by replacing on-device mining with cloud mining. Deactivation averted.

    The choice here was basically:

    1. Do nothing, Bitcoin Miner stops working for everyone on October 31st.
    2. Replace on-device mining with cloud mining, Bitcoin Miner keeps working at a rate close to Power Saving mode.

    #2 is better than nothing and is a temporary solution until we can ship an add-on from our website to re-enable on-device mining. From our side #2 is not good, because we're using GroupFabric's own in-house mining capacity to provide hash rate to users. We can only afford to do this because Bitcoin Miner is ad-supported. While cloud-mining means there are no mining power costs to users, everyone prefers on-device mining since hash rates are better.

    The current situation is a temporary stopgap measure until we can finish the add-on. We've had roughly only seven days to completely redesign things and are working hard to bring back on-device mining!

  12. 1,017 votes
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    93 comments  ·  General  ·  Flag idea as inappropriate…  ·  Admin →
    AdminAlex (CEO / Founder, GroupFabric) commented  · 

    Re Robert: At the moment we don't have ASIC support as most ASICs require manufacturer-specific software to work. Our main focus is on restoring CPU and GPU mining as we had to replace it with cloud mining due to the Microsoft Store policy changes.

    AdminAlex (CEO / Founder, GroupFabric) commented  · 

    Chruschow - funds are never lost - please contact support@groupfabric.com with the payout address in question so we can help investigate your account.  Also - if the Bitcoin payout address is changed in Bitcoin Miner any unpaid funds get redirected to the new payout address.

    AdminAlex (CEO / Founder, GroupFabric) commented  · 

    DB - we don't charge anything and nothing is denominated in dollars as we only deal with Bitcoin. You may be thinking of another service or company's product. Please contact support@groupfabric.com if you think something is amiss.

    AdminAlex (CEO / Founder, GroupFabric) commented  · 

    Monero (CryptoNight) hashes require ~256x more computation than Scrypt hashes. Also the underlying currencies are different, with different issuance cycles (Scrypt currencies tend to issue 25 per block every 2.5 minutes, while Monero issues 5 per block every 2 minutes). Monero is more rare and harder to mine.

    Contrast with SHA-256d in Bitcoin, which is ~2048x EASIER to mine than Scrypt, but is worth significantly less due to it being mine-able with ASICs.

    AdminAlex (CEO / Founder, GroupFabric) commented  · 

    The problem with ASICs is they are a moving target - each ASIC uses a different interface and each model obsoletes the last version. If you have a limited number of engineering hours you can spend, you're going to work on the things that help the most number of users first.

    An explicit goal of ours is to enable people to mine without needing external investment, and there are a lot of things we can do to boost existing PC profitability still before ASICs (Ethash, CrytoNight, Xbox, Android, iOS support, etc.).

    Also - most ASICs have dedicated mining software, so it's not an under-served market. Generally once folks are looking to explicitly spend money on hardware, they also invest in the specialized software for their hardware.

    AdminAlex (CEO / Founder, GroupFabric) commented  · 

    DreamofBits - users mine keep every thing they mine. You can verify actual mining is happening using Trace View or a network monitoring tool.

    AdminAlex (CEO / Founder, GroupFabric) commented  · 

    Appreciate all the ASIC interest! Right now Bitcoin Miner Pool is designed for PCs and Phones - it mines coins which yields best when mined on PC and Phone hardware which is then exchanged over and paid-out in Bitcoin. This provides a superior payout for most users.

    Unfortunately that also means if we enabled support for SHA-256d ASICs on Bitcoin Miner Pool, people using ASICs wouldn't see the superior payouts they do when compared to regular PC hardware, since SHA-256 coins are much more competitive and less profitable to mine (due to there being ASICs).

    AdminAlex (CEO / Founder, GroupFabric) shared this idea  · 
  13. 25 votes
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    2 comments  ·  General  ·  Flag idea as inappropriate…  ·  Admin →
    AdminAlex (CEO / Founder, GroupFabric) commented  · 

    It's something we want to add eventually - Microsoft recently banned on-device mining from Microsoft Store apps which forced us to replace on-device mining with cloud mining.

    Our current priority is restoring on-device mining for users with an add-on from our website, then improving yields with newer hashing algorithms.

    After that we want to give users the ability to tune their payout frequency so they can minimize wallet fees, and after that offer an Android version.

    Additionally we also want to have an affiliate program so users can also have another way to be successful like you mention.

    Everything we're working on right now is to make the mining experience better and more profitable for users. There's only 24 hours in a day and it's a lot of code to write, but we are making progress slowly.

  14. 4 votes
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    4 comments  ·  General  ·  Flag idea as inappropriate…  ·  Admin →
    AdminAlex (CEO / Founder, GroupFabric) commented  · 

    Hi Justin, agreed - we're not happy with mining performance right now (Microsoft's recent ban of on-device mining meant we had to disable GPU and CPU mining, so right now hash rate is comming out of our own cloud).

    We're working on the add-on to re-enable on-device mining; it's a ton of code and we need to make sure it's done right. Hopefully in a month or two it will be ready.

    Best,

    Alex

    AdminAlex (CEO / Founder, GroupFabric) commented  · 

    Justin Ferber/LuckeY - Bitspeed.io is requesting you to deposit Bitcoin in order to get permanent future payouts; that's likely a pyramid/ponzi scheme (if it's too good to be true...you know what they say).

    GroupFabric will never request payments for any sort of perpetual future payout. Our apps are free (ad-supported) and users keep what they mine.

    In the future we hope to offer some a way to turn off ads in exchange for a % of what is mined, but it's our belief that the core application should be free and we should only do well if users want to run our apps.

  15. 5 votes
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    1 comment  ·  General  ·  Flag idea as inappropriate…  ·  Admin →
    AdminAlex (CEO / Founder, GroupFabric) commented  · 

    Do you mean labeling each share listed on the pool website? If so, that is something we do want to do!

  16. 19 votes
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    3 comments  ·  General  ·  Flag idea as inappropriate…  ·  Admin →
    AdminAlex (CEO / Founder, GroupFabric) commented  · 

    We're working on a version where users can choose to disable ads in exchange for a % of what is mined.

  17. 183 votes
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    13 comments  ·  General  ·  Flag idea as inappropriate…  ·  Admin →
    AdminAlex (CEO / Founder, GroupFabric) commented  · 

    At the moment Google doesn’t allow miners on their Play store, so any miner we would develop would only be available via side-loading. Because of this we’re working on improving profitability for users by adding support for more mining algorithms like CryptoNight (Monero) and Ethash (Ethereum) over an Android version.

    AdminAlex (CEO / Founder, GroupFabric) commented  · 

    We're still working on it, but engineering resources are limited and most of our work as been focused on improving or maintaining profitability for users.

  18. 15 votes
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    2 comments  ·  General  ·  Flag idea as inappropriate…  ·  Admin →
    AdminAlex (CEO / Founder, GroupFabric) commented  · 

    We do have some items planned for website later this year - our first priority right now is improving yields for users with better mining algorithms.

  19. 22 votes
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    1 comment  ·  General  ·  Flag idea as inappropriate…  ·  Admin →
    AdminAlex (CEO / Founder, GroupFabric) commented  · 

    The reason it's hard to find shares on SHA-256 pools is that the default pool in Bitcoin Miner is actually a multi-pool, where it has your miner mine whatever is most profitable for your PC/Phone, and then converts it over to Bitcoin.

    When you directly mine SHA-256d, the hash rates will be higher but yields lower due to the much easier SHA-256d mining function. Directly mining SHA-256d means you end up competing with large datacenters filled with ASIC hardware coupled to dedicated power plants.

    What we're working on is improving the internal mining engines to support more currencies so users can use Bitcoin Miner to also mine PC friendly currencies like Monero and Ethereum.

    However to make it user friendly also requires a default mining pool (for users who don't want to deal with pool setup or other companies), and for this reason we no longer offer a Litecoin Miner since we'd then have to support more than one payout currency.

    On Dogecoin - we no longer offer Dogecoin Miner because Dogecoin was changed so that it could be earned when mining Litecoin (merge mined). Since most Litecoin pools allow dual mining of both Dogecoin and Litecoin, it didn’t make sense to have a standalone Dogecoin miner.

    Also, the Dogecoin project hasn’t been updated for over 3 years, so it’s fairly risky as there hasn’t been much developer support. You can view confirm this via their source code repository on GitHub at https://github.com/dogecoin/dogecoin.

  20. 119 votes
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    19 comments  ·  General  ·  Flag idea as inappropriate…  ·  Admin →
    AdminAlex (CEO / Founder, GroupFabric) commented  · 

    @ Matteo - it's a fair concern, we did do some upgrades over the past two weeks and yields have improved slightly. There's been an overall recession lately however we're continuing to work on improving yields.

    AdminAlex (CEO / Founder, GroupFabric) commented  · 

    Still working on the engineering for improved mining algorithms.

    AdminAlex (CEO / Founder, GroupFabric) commented  · 

    Yields have already gone up - also global mining difficulty is significantly higher than it was months ago which negatively affects yields.

    What will have the largest positive impact on yields is when we can get more mining engines online that support more currencies which is what we're currently working on.

    This is not something you can wish into existence. It takes months of real R&D to do.

    AdminAlex (CEO / Founder, GroupFabric) commented  · 

    Yes - we're hoping to see significantly improved yields within 1-3 weeks.

    AdminAlex (CEO / Founder, GroupFabric) commented  · 

    Yields are also affected by Bitcoin network fees - the Bitcoin network clears approximately 2000-3000 transactions every 10 minutes, and there are over 100,000 transactions in Bitcoin's queue right now. This number increases or decreases depending on how many people are sending transactions. For up to date stats on this, please see https://jochen-hoenicke.de/queue/#24h

    When fees are high yields will also go down, at the moment fees have been exceedingly high for the past two months.

    AdminAlex (CEO / Founder, GroupFabric) commented  · 

    The default pool in Bitcoin Miner is a multi-pool, where it has your miner mine whatever is most profitable for your PC/Phone, and then converts it over to Bitcoin.

    Fees are good if they are on the currency you are mining (converting from - these add to the yield).

    Fees are bad if they are on the currency you are receiving (converting to - these remove from the yield and can slow payouts).

    Directly mining Bitcoin's SHA-256d hash algorithm would unlikely be profitable to PCs and Phones due to the extreme competition from datacenters filled with ASICs, coupled to dedicated power plants.

    AdminAlex (CEO / Founder, GroupFabric) commented  · 

    Another thing to note are the current status of network fees as incurred by the pool, you can monitor this here: https://jochen-hoenicke.de/queue/#24h

    AdminAlex (CEO / Founder, GroupFabric) commented  · 

    More math needed.

    Bitcoin dropped from 10k$ to 8k$ for ~10 minutes, then went up to 11k$/BTC.

    The yield of 0.2 Satoshis / Share @ difficulty 1 was at 7k$/BTC.

    The yield of 0.17 Satoshis / Share @ difficulty 1 represents a 15% drop, however going from 7k$/BTC to 11k$/BTC represents a 57% gain.

    Complaining about a 15% yield reduction when the underlying asset has experienced a 57% gain in short period of time doesn't make sense, since you're still earning 33% more (1.57 * .85 ~= 1.33).

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