I have been answering 2 support tickets for more than two months.
They allow the purchase in btc of COX and do not allow the sale when they can not be moved to another exchange. Yobit is stealing user's coin in that way and it's not the only currency they use to cheat. BEWARE THIS IS A SCAM
Customer support at Yobit is not very good in my opinion. I stopped using them a long time ago because their platform is not very user friendly and they dont have good coins. The couple of times I contacted their customer support, they only halfway answered my questions. I would not trust them with a lot of my money and they dont have many good coins to trade anyway.