What you are saying makes sense but what I see are basically the same payouts (small variation) but hugely varying maintenance fees. Sometimes the maintenance will be 2x the payout. Recently the last day or so there has been a lot more maintenance charges that have been more than the payout (per payout) if I average all of these transactions I get 75%+ maintenance in the last day or so. Is this how they do it? The payout is fixed per GHs and they vary the maintenance to compensate when they are unlucky?