What is a "market maker"? How does the new BTC-China "market maker reward" work? Has it been tested in other markets before?
If your order executes immediately you pay a commission. If it sits on the book and someone else buys/sells into it you earn a commission. Bitfloor had the same system.But does that really encourage volume?
It seems that it encourages posting an order a penny above or below the best opposite offer, and waiting for the other guy to make the move.
Which, by the way, is what seems to be happening at BTC-China right now...