I don't see this clarification in your TOS. This is the first time I encounter a casino promising to only enforce KYC to FIAT users.
I think I have heard this before. There are other casinos that do not require KYC for crypto users, but they do require KYC for fiat currency users.
It is not a question of requirement because FIAT option can't be done without knowing the user's identity. It has no sense to stipulate this in the TOS like it's an exception. And for a regulated casino, it is hard to believe that it can be a NO KYC service as long as it can be enforced for whatever reason.
Its not new since nearly all casino will require KYC and this casino might be one of those enforcing KYC to fiat deposits. Usually crypto deposits don't require KYC that's why many people preferred to use crypto than those fiats.
Plump also write this on their TOS.
19.1. Plump.com reserves the right, at any time, to ask for any KYC documentation it deems necessary to determine the identity and location of a User. Plump.com retains the right to restrict the Service, payments, withdrawals and access to funds if the identity verification is not completed within 72 hours.
So that means KYC will be enforce anytime if they want to verify something.
Best for people to read their TOS
https://plump.com/terms-and-conditions to avoid getting confuse on their rules.