Recently co founder of celcius was also following him to resign from celcius. Im sure the they are seeing potential for them to be jailed in the future. that's why they are resigning from celcius. It seems like celcius will have new ceo. This defi was scamming billions of money.
Even if they resign am sure if there is any strong evidence against them in connection whit what happened the authorities can easily take action. Resigning does not completely erase them from the situation, i believe investigation is ongoing so they can keep up with the act and hope there is no foul play that will raise suspicious.
This is why not your keys not your money is strongly emphasize on, when something unexpected will happen to these exchanges you will be stuck, unable to withdraw.