You might wanna take some time to check out this thread^[1], I’m not sure the exact reason why he left this thread that’s still open to create a new thread just to continue the discussion that was Originally being discussed here. I’m not sure if you’ll find anything that’s related to your question but I still feel it’s important to at least go through it if anything there is going to clear things up for you.

[1] https://bitcointalk.org/index.php?topic=5526018.0

I highly doubt, op is likely not from Europe, if he was, he possibly wouldn't be asking for a casino that supports usdt withdrawal, knowing fully well that usdt is currently facing some charges from government in that region and may potentially be banned.

I personally believe ops choice of giving a special attention to usdt withdrawal is nothing short of usdt being the most popular stablecoin in the cryptocurrency market at the moment, and maybe conversion of usdt to fiat in his country is very simple and doesn't require going through any complicated process, this is possibly why he(op) made mention of usdt and nothing more.