If depositing or withdrawing via Fiat currencies then KYC is required, if depositing and withdrawing via crypto KYC will not be required
I think this is fairbut if we see something suspicious We may ask for KYC.
I search regarding this because I remember before that some crypto gambling sites also required KYC in some circumstances.
For example. Sportsbet.io
https://sportsbet.io/about/terms-and-conditions3.10. We have the right to carry out "KYC" (Know Your Customer) verification procedures and access to your Member Account may be blocked or closed if we determine that you have supplied false or misleading information.
7.4. We reserve the right to block / delay processing of withdrawal requests until requested copies of valid photographic identification, proof of address and/or credit/debit card are provided to our satisfaction (KYC).
So I think the rules of the casino is just inclined with the standards.