Honestly, I find it complicated. Just looking at blockchain activity to decide if someone is addicted to gambling isn’t a solid reference. Anyone can make lots of gambling transactions or play regularly, yet still not consider themselves addicted.
This is truly not possible at all. No one know how much the gambler is rich. Someone like Drake bet huge amount of money because he is very rich. That should not be the reason they should self-exclude him from gambling. This will only be a poor approach against gambling addiction. Gamblers should be the one that should go for self-exclusion on a gambling site by themselves.
So does it mean that gambling site automatically self-exclude their gambler from their site or what?
Yes you mentioned the right way which they should do, that doing auto without the account owner having knowledge of it could be disastrous because they could lose huge amount of money from that site and they aren't able to have access or account is being closed and restricted the operator do not have access it again. Most times the crazy gamblers could sue them for that singular acts.