It's safe to assume most if not all casinos have KYC now even though they are casual about it, but should you win big their AML rules kick in which usually agitate players .
True anonymous gambling is long gone,the earlier we accept this for a fact the easier it is to deal with KYC/AML.
Congrats on your big win OP.
There are still some sites out there that will allow you to gamble without you having to verify (KYC) but it gets a bit tricky when you win big. They usually require you to "verify" after a big win and when you want to withdraw your money.
They look the other way when you push the wager for them, because that is how they are making their profit, but when you want to withdraw.. they lose money and that is why they will look for excuses not to pay.
A site like Freebitco.in will never ask you to verify and there are a few others, just Google it.
Aside from Freebitco.in then i do know other sites as well when the time you hit big then theres no questions asked.Based on experience and observation
after all the years then these sites do pay without strings attached.
•Stake
•Crypto.games
•Bitdice
•Bustabit
This is where reputation and popularity do counts because these things wont be attained if they do really have some bad experience
about big payouts and then suddenly asked for some personal verification.