so is it possible that those casinos doing their no KYC stuffs are not even registered? [/b]
It is possible that they are not yet registered and have started illegally. Starting with no statement of KYC registration in sign up stage, deposit stage or even withdrawal stage in their "Terms of service" is a big red flag and sign of a casino that may just have been opened for a criminal reason, a casino with no intentions to remain in the business.
KYC requirement is not only to curtail money laundering activities, It is also helping to reduce the increasing number of underaged gamblers.
Well, a lot of platforms don't acquire a license so that they can provide their services without asking their customers for KYC verification because they feel that there is a high demand for no-KYC platforms within the gambling community and it's true to some extent. However, I believe most people are slowly accepting their faith and understanding that a no-KYC platform won't really be able to stay around for very long, it will either close down or it will be forced to comply with the KYC and AML rules.
So, even if a casino doesn't have any intentions of doing criminal acts or allowing that to happen, it will have to give up on its arrogance and accept the rules of the regulators or they will simply close it down which will be a big loss for the owner of the casino as they will lose everything they've invested in it.