I know there are many crypto casinos on the internet claiming to be KYC free, although they don't even enter this forum, so it's likely they are shady scam platforms that must be avoided, especially for a high roller gambler.
The only trustful KYC free crypto casino I know is freebitco.in. But there you won't find a plethora of gambling games. You will have to stick with dice, lottery and events betting...
A friend won max win on one slot, over 10k, he is not verified but the withdrawal went smoothly, nobody asked him for KYC... I am talking about the casino in your signature. I also know some guys from the Gosu group who play at BC, big deposits and withdrawals, but still, nobody asked them for KYC. It's the same at BC.games.
Real players won't be asked for KYC just like that. I am talking about players who have more deposits/withdrawals, they win and lose, and basically, they play games... it's easy to check that. I have the same experience with the same casinos, with a lot lower deposits/withdrawals of course. I just wish to point out that even some big names don't ask for KYC just like that even if some higher amounts are in question, it's more about how people play and do they just "mix coins". Again, that is easy to check with a player's bet history.