To be honest I believe no casino will make such rules without including them in their terms of agreement however it is so unfortunate that most users fail to read those terms and conditions.
KYC still is something every internet user should try to avoid at all costs due to the risk it exposes users to.
This is what i expect gamblers to know that the gambling platforms cannot bend down to the gambler's request except if such comply to their terms and conditions, there's no way i will be using a platform but yet insisted that i don't know much about them, if i don't then they are smart enough to fish out things that they know am unaware of concerning to them and then they use it against me untill further proof and informations were given.