RE: Miningpoolhub.com - Check The Miner Live
How much difference does it make for a small mining rig and how do they finance the reward?
Whenever I see such a distortion of the price feed, I am tempted to ignore it because it takes away the transparency and it always begs the question of the business model (-> see Bitconnect).
Bottom line: If you can't figure out the details and how exactly to find the optimal setting, then ignore these offers. They are usually there to cost you money and not bring you any.