I assume it bc they might be called a Money Facilitator. Though how Asian exchanges get away with it I don't know? Maybe they are moving their opt but idk why they close.
IMO Openledger and CryptoBridge were shady exchanges that used buzz words to get people to use their exchange. To be honest, they really never needs a blockchain but just to get a feeling of "own keys". I suspect they just exit scamming....
Bisq though is the real DEX just really hard to use :(
I think we really should stop saying dex but noncustodial bc those are much easier to use ie Holdhodl and Paxful(kinda).