It seems to me that this is a fraud. Another proof that using an account to place funds is very risky. For this reason, I use only those services where there is no registration for transactions. Changenow for example, but this is just my preference. I'll follow this story, I think we are waiting for a lot of interesting news.
It's known that the main point of crypto is to be "your own bank" i.e. to keep your money in your own wallet for which you own the private keys (or seed).
But many find the exchanges convenient for storing and many try to speculate on the price, hence putting their funds at risk.