it wasn't just the 0.2% fee but a lot have changed over there. their margin trading has stopped, and so much of their fake operations with fake volume has stopped because of the pressure of PBOC.
p.s. what website is this chart from? (by the way thanks for sharing, i was actually looking for something like this)
where i can get information about china exchanger stoped margin trading service
the big volume transaction china exchanger and open service margin trading too, btcchina, huobi and okcoin