Payouts for GM have been higher since the last 10% increase on SHA . maybe they have the math backwards :-)
i disagree.
Below are payouts for 50 GH/s SHA 256 from one day before last difficulty change till now. Payouts based on 0.0012 USD per GH/s fee.
Payout before difficulty
Mining Day 23.11.2015 0.00019439 BTC
Payout after difficulty
Mining Day 24.11.2015 0.00015773
Mining Day 25.11.2015 0.00015877
Mining Day 26.11.2015 0.00017065
Mining Day 27.11.2015 0.00017470
Mining Day 28.11.2015 0.00017457
So looking at that, where is the payout that is actually 10% higher than it was before the difficulty change? Payout before the change was 0.00019439 and last payout was 0.00017457
I would say that payouts have decreased since the difficulty change.
The payouts have rose in the last few days since the difficulty change because BTC price has been slowly moving up again.
Here are the payouts for contracts with 0.0015 USD per GH/s fees. Again based on 50GH/s
Payout before difficulty
Mining Day 23.11.2015 0.00014801 BTC
Payout after difficulty
Mining Day 24.11.2015 0.00011098
Mining Day 25.11.2015 0.00011241
Mining Day 26.11.2015 0.00012272
Mining Day 27.11.2015 0.00013280
Mining Day 28.11.2015 0.00013228
Again..where is the 10% rise on SHA.
If you are referring to your X11 payouts, again, that has nothing to do with SHA. BTC (AUTO) is based on mining most profitable X11 coins and then those are traded at payout time to BTC, so if those X11 coins mined go up in value against BTC, then so does your payouts.
BTC difficulty does not really have an effect on X11 mining but BTC value can.
For example when BTC price went up to almost 500 USD recently, the prices of most coins fell against BTC. Litecoin rose a little but apart from that most coins fell in value. Dashcoin and Start fell alot in value during the rise and the reason for this was most likely that people that had lots of coins they were holding, saw the price of BTC rise and then traded all their coins to BTC when they could as nobody had any idea where the price of BTC was going to go to. So lots of coins being traded meant that they were being dumped on the market so their value decreased so when those with X11 using BTC (AUTO) were getting their daily payouts, the amount of BTC they were getting fell.
In one of the links above you can see what has happened to Start and Dashcoin value over time.