I believe that those who create multiple accounts merely for catching bonus only are aware that they have the chance to be banned but who can stop people creating multiple accounts? They know the risk of what they did but they keep doing it because of money and they will not regret it because actually they did not risk anything. I think the best solution is to stop streamers to offer free money, or at least give a bit difficult requirement in order to get the offer from the streamers. If the offer from streamers is 100% free, the creation of multiple accounts will continue all the time.
Nothing can stop them from creating multiple accounts just to earn bonuses. Only they can be aware of the risks they can get later if the casino knows it and the casino knows it. But strangely, that doesn't stop them from even knowing the risks because they can complain to other sites that the casino is rigged when they are the ones who are. But it seems that stopping the streamer from offering free money is a bit difficult because the streamer also shares their referral link at the same time so that their followers will join under them.
Indeed, if you look at the condition of the decline with KYC, it will definitely decrease, but if gambling wants to avoid multiple accounts and ining verification to improve various things such as protecting the site from those that should not exist due to age and others.
In the end, all actions must have consequences and in this case everything that is taken whether it applies KYC or not is clear that this will have an impact so now it depends on which policies the big sites will take whether to apply KYC or not because all actions certainly need to have consequences.
But it seems that crypto casinos will eventually implement KYC due to regulations from regulators. And we as crypto users who still gamble frequently, must understand that it is part of the regulations carried out by crypto casinos. Maybe now we are still allowed to play gambling without verifying, but who knows, we will be required to do KYC next year. Maybe small gamblers will not be asked to do KYC because casinos don't see it as important. After all, casinos have more big gamblers who often deposit big money and get big wins. So it really is a good idea to remain a small gambler. After all, our goal in playing gambling is just to have fun.