One thing I'd add is checking whether the rules match the no-KYC claims. Sportbet.one, for example, states that it doesn't require ID documents, but its terms still allow account reviews for suspected abuse and require 1x wagering on deposits. Those details matter more than the signup page.
I believe a casino may require KYC verification to prevent fraud and money laundering, however it could also be the other way around and use our personal information for the casino's own benefits. So if I have to chose, I will definitely settle with no-KYC requirement, but the thing is, casinos can be tricky too, they will claim to be no-KYC requirement but later on require one, and we have no choice left but provide just to withdraw those significant profits gained.