I received free Bitcoin Cash on Bittrex just for holding Bitcoin over night! I'm not a usual holder of Bitcoin but even it was announced that you will receive the same amount of BCC as BTC if you hold it, I decided to try out and lo and behold...it just appeared in my account!
As a matter of fact I moved my money from poloniex to Bittrex for that reason!
Poloniex has too much negative stuff going on with then that people do not like so I think my time with them is coming to an end anyway... So long Poloniex! When you start doing business in the best interest of your customers...maybe then I will return, but there are too many exchanges out there to be shafted by you!