A couple of agencies had a good promo market yesterday. UniBet was doing either team to win bo 10 points or more paying $2.50, TopBetta was doing either team to win by 10 points or less paying $2. Those odds present an arbitrage opportunity. You can make money no matter what the result. Max bet on both was $100, so put $100 on TopBetta, and $80 on Unibet, and you've just made yourself a certain $20. But it's better than that. This is also what is called a middle, where an opportunity exists to win both bets, which will happen if either team wins by exactly 10 points. And what do you know, NSW won by exactly 10 points. So that's a total return of $400 for an outlay of $180, or $220 essentially risk free profit.