They are a coin trap. Depositing is easy, but they are a scam from what i hear.
I doubt that they are an outright scam, but they for a long time have various issues and annoyances they can't seem to get rid of. Weird thing is that certain people are quite satisfied with that exchange, but in the same way, quite some people really hate it for everything being mentioned in this thread. It's basically the same with Bittrex.
Bittrex has gained an incredible number of new users lately (mainly due to Poloniex), but very recently a huge load of complaints has piled up quickly ~ it shows that there is a desperate need for decentralized exchanges.
Centralized exchanges are subject to all types of regulations, which is largely the main cause of the issues and annoyances exchanges have to put their traders through ~ it's likely going to be worse in the future.
They have stolen 44k USD from me, its been over two months. I have provided ID and done everything they asked.
They keep road blocking me, there is another guy that had 130K USD stolen as well, exactly same circumstances.
They are selective scammers.
See my thread on Reddit:
https://www.reddit.com/r/ethtrader/comments/6vymim/scam_accusation_hitbtccom_scam_stolen_tokens/