I think you might get confused by the fact that btc was way up a month ago.
A 20% increase in bitcoin value can be a much bigger increase in payout.

This is because the costs/fee are a fixed costs.
If bitcoin rises by 20% this costs stays the seem, resulting in a larger payout.

You are referring to  the peak arouund 1200 dollar. Yes, it makes sense payout was higher at the time.