There are only a few honest no KYC casinos still operating. I'm sure you've missed some of the discussions on gambling boards about new casinos joining the community and making claims about being no-KYC. For many of them, it's nothing more than a marketing strategy.
They claim to be no-KYC because they understand that many crypto players prefer these casinos due to privacy concerns. So, they use this claim to attract players and build trust, even when they have no intention of keeping that promise. At some point, they end up asking for your documents before allowing you to withdraw your funds, despite claiming from the beginning that they don't require KYC.
Then to what extent and how long will such trust that was built on deceitfulness last? Because to me once I notice sure from any casino, you are as good you don't exist. You have messed up your reputable yourself and nothing will ever make me see you serious to the extent of having any business with you.
Again, what casino owners fail to understand is that sincerity and when you're truthful, that alone is a marketing strategy on its own. Because people will easily trust and respect your brand, they will feel more saved with their details with you then someone that says a whole lot about their business and fail to keep to any of those promises.