I suggest don't use their service because they are well-known "freezing account" without violating any terms and there is fresh news about it from
here and I don't like more people to become one of another victim.
Much better to trade on other well-known exchange for safety purposes like binance.
This tactic is still the same. The obvious observation leads to conclusions that they selectively scam their users under the guise of "freezing accounts" but keeping that aside their fees are not exactly great either.
My advice to all: avoid HitBTC