If you see a new anonymous casino, then turn around and walk away because the chance that they will scam you is huge. But there are some cool and old anonymous casinos, my favorite of them is Just-Dice, it used to be for bitcoins but for legal reasons they had to switch to new coin. But the site and the provably fair engine is the same. They allow you to have and bet with multiple accounts, and they don't have KYC, the withdrawals are instant and the engine works fine, i enjoy betting on that site.
What is anonymous casino anyone? The one that dont ask KYC, but can ask for it anytime, or the one the require obligatory to pass KYC during registration? There are several casinos which I have been using for gambling for years, made many deposits and withdrawals and was never asked to pass KYC. Maximum what was done is email verification, which is a joke, as anyone can use any 5-min email service for registration.