I have used this exchange and have not found any issue, but few people said that sometimes HitBTC ask a nonsense free while trading or withdrawing their funds. After that, I decide to stop trading my funds there, I don't want anything bad happens to me. We all need to be more careful in choosing exchanges and go away after you found a suspicious thing.
We have the same experienced and so far so good I didn't encounter such a problem. I saw it here many complaints regarding that exchange maybe they have a lack of research that may encounter a problem regarding their support. I know that this exchange is lack of support team who help you out your issue. HitBTC for me is no issue for me, I am saying this base on my experience.