If you don't use big money to deposit and gamble or withdraw a big amount of winning money, you won't be asked to do KYC.
Nah, that's not the case. Don't believe that you won't be asked for KYC just because you're not using a ton of money for gambling or withdrawals. KYC is a common thing that lots of online gambling sites do to make sure they know who their customers are. So, even if you're not betting big bucks, you might still get asked to do KYC.
But casinos can ask you whenever they want because that is their place of business.
Now you are contradicting yourself.