Coinbet24 is the WORST bitcoin sportsbook. Randomly limiting winners, too low bet limits, no support.
This is a bit scary - so people get limited for betting too much? Then you have no chance of getting the bonus, that seems a bit unfair...
No one off course gets any limits for winning. This would be crazy. Some win, some lose. That is the nature of the game.
Only you may get limit, if you main purpose is arbitrage betting (surebetting).