why does it only pay satoshis for anything under 8 difficulty?
should pay for all difficulty levels at a higher rate. I have only seen payouts on everything under 8 difficulty and nothing more. BITCOIN MINING IS A JOKE. .45 cents for 5000 satoshis and 12 days of running computer 24/7.

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AdminAlex (CEO / Founder, GroupFabric) commented
Current Bitcoin network difficulty is in terms of exa-hashes per second; make sure your expectations are realistic relative to the capabilities of your hardware as many firms invest hundreds of millions of dollars into data-centers and custom power plants.
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Matteo Lovato commented
I suggest you to use power saving mode and no GPU.
Use your Pc resources to install VirtualBox with some 1Gb ram machines with a miner for each.You will get 1-2 difficulty blocks for each miner, they will be processed faster and you will get more yield with the same power consumption