I’m not sure too about this because I’m not whales but some casino indeed requires KYC to user with huge amount of balance due to AML requirements. Some casino just manage to void it for whatever procedure they do to remove it to there license terms but in general AML policy this is required. You will notice this on ToS of online fiat casino that recently convert to crypto.
It's true that some gambling sites require gamblers to submit their KYC when withdrawing big amounts, but there are many other sites that don't require any form of KYC when withdrawing big amounts unless they found something suspicious.
I know some people who withdrew big amounts in this manner and never submitted KYC so far.
@Eternad I believe that they can subject anyone to KYC even if he’s just a new player, and to be honest it’s a safe practise as they’re keen to run their business in a legit way. @Haunebu while there’re casino’s that do not follow KYC, but would you be able to trust them when they don’t follow their own country basic laws so what’s to say that they won’t scam their user’s, and thus in Roobet’s case we know that they follow the law and thus they can be trusted.