Sounds a bit shady. I’m obviously not interested in something like this but I wonder why you want other people’s accounts instead of just opening a new one yourself. It would seemingly be much easier and wouldn’t require you having to do anything for someone. I’d be wary to let anyone have access to any of my account for any reason ever.
You should read more carefully, he is clear and transparent at least, he get limited at almost "at almost every crypto or online bookmaker", if you don't know what it means despite promoting a bookie, you should look for that matter. When a player starts to earn too much money, sportbooks spot him, and restrict his account or ban him.