DietBetter.com and the companion app Diet Bet (iTunes) let you bet on yourself to lose weight! The games are a $25 buy-in. Your options are: "Lose 4% in 4 Weeks" or "Lose 10% in 6 Months". At the end of the game, the pot is split between those who hit their goal weight. To keep it fair and for verification, you submit a full-body selfie and a picture of your weight on the scale...before and after. *The pictures are submitted to a referee only and are not published.