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 pretty clear and transparent at least, he openly admits getting limited "at almost every crypto or online bookmaker", if you don't know what it means despite promoting a bookie and regularly posting in this section, you should make some research on this topic. When a player starts to earn too much money, sportsbooks usually spot him, and restrict his account or ban him. A restricted/limited account is useless for a bettor, because it doesn't allow to place normal amounts of money on interesting bets and/or it lowers the available odds.
There should be a purpose for being limited and it didn’t disclose in OP.
Maybe, restricted because of a country which didn’t allow you to enjoy every games on that site. Buying others account is not ok, its like cheating the site and it will be more worst if you get caught, you might post later on about being scammed by the site when it fact you tried to cheat in the first place. Try to look for other site that can work for you, read the details and rules of that site, you can know by this if you will be limited or not.