I do not think that the complete disappearance of anonymous casinos is coming. First of all, because they will remain in demand and will always have their own clientele. And also we must not forget about the existence of different jurisdictions in the world.
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Anonymous casinos are indeed still numerous and even thriving nowadays all over the world,
but anonymous casinos that say they are without requiring KYC are just scam casinos that will take the money of the users easily because the algorithms they create are just for the benefit of the casino itself.
Even 1 person has thousands of anonymous casinos that cannot be trusted but there are still many who are stuck in such casinos.
Each country has its own policies about the regulations that will be set for online casinos, but more are implementing KYC for casinos that are legal,
because it is to deal with criminal activities such as money laundering and the like.
You're right, but fraud in the gambling industry is only part of a bigger problem. The problem with fraud is much bigger than just the risk of fraud among anonymous casinos. In recent years, the whole world has been flooded by a wave of fraud, literally in all areas of social life. This is probably a harbinger of some huge changes in societies. As for casinos, it happens that KYC is not a guarantee against fraudulent activities. In general, I believe that for casinos, including anonymous casinos, the most important factor is the reputation among gamblers.