Yes, bookmakers often legally ban or restrict successful punters to protect their margins. Successful punters may be banned from promotions or restricted to bets of only a few cents on sports, but Minimum Bet Laws (MBL) require bookmakers to accept bets for punters to win up to $1,000 or $2,000 for racing (depending on the code and state).
If you have ever been restricted with any bookmaker, you’ll know that losing access to promotions and having heavy bet limits makes it almost impossible to keep betting with them. They are basically telling you to “go away”, without actually telling you.
What are your options?
The restrictions from one bookmaker won’t follow you to another bookmaker, so you can join any of the other 130+ active betting sites in Australia and get access to any of their promotions that might be available to you.
Are there any betting sites that won’t restrict winning punters?
Yes, a betting exchange like BetFair won’t restrict winning punters in the same way as other bookmakers, because it is not directly taking bets (and risk) itself. BetFair is a P2P betting platform, so you are betting against other punters and BetFair only takes a cut from winning bets.
Sources:
https://www.abc.net.au/news/2019-01-20/gambling-how-bookmakers-stop-winning-betters/10708394
https://www.theguardian.com/australia-news/2023/sep/20/gamblers-hit-with-restrictions-after-profiting-from-betting-agencies-promotions