First of all that questions shouldn't go to me. I'm not running this bussines.
But I may guess...
2 weeks ago there wasn't so much interest, less clients, less total payout. AMHASH 2 weeks also didn't sell good.
1 week ago more users jump in (even I got 1 refferal), also price of BTC was 380$. AMHASH divs was higher, more people start to buy AMHASH3.
Last week was bad in terms of price, 310-330. Many people didn't turn off autobuy option, that's why this week total payout was smaller. AMHASH divs was below 800 (week earlier above 800) satoshi despite lowering maintenance fee.

All is adding up...  Even company from your sig behave similiar...