Pretty simple actually. Before each spar, a pm will pop up asking the players there if they would like to place a bet on the next spar session. The bets that can be placed I think should be $5, $10, and $15(maybe more idk). If they bettor wins they get twice as much as they bet. Also, if the person who is sparring wins, not only will they get the W but also get money depending on how many people bet(Ex. 10 bettors= $10) something like that. Downside is that it possibly would make spars start a bit longer than usual. Just a thought for people to make money I guess