Hi, im new to forum and wanted some help, I started mining bitcoins about 2 weeks ago with antminer s1 overclocked to 200ghs, first I was getting around 0.0044... bitcoins per round when difficulty was at around 4,,, but now im getting like 0.0033 per each round. can anyone please tell me does difficulty effect how much you get per each round because I thought higher difficulty meant longer rounds... my speed is around 200ghs like before but lower btc per round. can anyone explain why the change has occurred. thanks in advance