If you want to know why you are getting less pixels from the pool, You only need to look at Land 4420 for 10 minutes. These are the pixels of your share that are disappearing.
ive been mucking around the green pond and wasted around 60E and just couldnt find the power pixel. Solution? Buy one for 1 COIN at the marketplace. Tada!!!!
i think this might be bugged, stuck on part 3 in the dungeon after spending 300 energy clicking around i gave up. this rep thing to get to the market place is super annoying.