Considering he definitely has some funds on deposit, it wouldn’t make sense and would only piss him off. He can just sign up at another online casino, and everything will start all over again. Royal Reels has a self-exclusion mechanism, but you should talk to your brother first and explain the principles of responsible gambling to him. I think it will help him play sensibly and choose his own break period between visits to online casinos. He could start with seven days and find another hobby, for example. I hope it works out well for him.