It seems that there are some exchanges that has common issues regarding support and token problems/listing.
I'm trading few coins in binance and looks like huobi is doing the same thing on what binance did before by offering their token which made them reach their success.
I think binance solves many trader issues as they fees is only 0.1% on each side.
For less than a year they became popular and most of the reviews were excellent about them..