There's no rule violation.
You get limited as soon as you aren't a braindead sportsbettor, that's it.
If you beat the closing line value, your account is dead instantly.
Only exchanges and pinnacle won't limit you but they don't offer that many markets to bet on.
I've been limited from probably 100+ betting accounts, this isn't mafia, rule violation, scam or whatever, I just have better odds models and quicker to adjust than the bookies, so they shut you down cause they don't want any profitable bettor.
Yes, they'll let you win if you're lucky and win betting on dumb stuff, but you're out if you beat their closing odds, even if your bet lose.
That can't be said for the trusted bookies like Stake or many others that are operating out there, they wouldn't limit a gambler only because they win their bets, but they will surely do it if they suspiciously win every single bet that they place which surely raises a red flag about the player, and not every single casino will limit the same player for that one issue you mentioned.
OP has probably violated some rule that every casino has in their terms and conditions and that is the reason why he is limited in almost all of the platforms. Helping him in anyway would only get the helper in trouble if suspected.