How come a lot of these big pools are suddenly inverting their pool fee?... ranging from -3% to -10%... so essentially promising a 103% to 110% mining profit...
how did that happen, and where do these extra BTC come from?
...
They have been taking the txn fees+pool fees from their miners ever since they started their pools.
They've been getting many millions of dollars each year just in "pool fees" from their miners.
Maybe they are considering returning some of those txn fees they've been
stealing taking? ...