We have seen many complaints about this Hitbtc, Hitbtc exchange is stealing people's money. I don't know why still, people are trading in Hitbtc even though there are many complaints about the exchange, people should stay away from these exchanges.
There are many reasons why they keep trading on the exchange, can be the coins they want to trade are only listed on hitbtc or also because they are new traders and have not first seen or research reviews and check about fees on the exchange.
Unpleasant things is that they also hold our coins in the main balance, not all coins can be added to the trading balance and what is left in the main balance cannot be withdrawn due to high fees.