Those are usually just people who are pissed off because they didn't get to sell their coins - which is normal when there's a delisting - or when no withdrawals are possible because the coin is broken - which is not the exchange's fault. I've lost coins like that before and you just have to suck it up or withdraw and hope someone revives it.

However, in my case, they kept 5,300,000 of a coin that was listed on their status page as "OK" but which I couldn't withdraw because of their system (max withdraw was set to zero despite the coin being active). And they've built a KYC system that makes no sense, keeping everything else I had. Support keeps repeating the same crap that doesn't apply and refusing to do anything, basically a huge "f*@k you" with no recourse. (Well, since they're UK-based, there's the Financial Ombudsman, who I'll be talking to, even if it's just to piss TS off with an investigation.)

Definitely avoid.