I am very much interested in this part. Where and how do you derive this figure that you have to receive ~5.00 on each day if you have 2.57 Ths ? I had a 10 Ghs gear from a now diffunct Asic Miner long ago, while difficulty was far lower. There were multiple week when I mined nothing with that 10 Ghs. So, if your mining amount drops for a certain period, how can you complain about that ? This is very normal in mining!