I thought I'd share my personal experience with PACT today. Programs like this (get paid for healthy habits, pay out if you commit but don't deliver) can be very motivating ... those DietBets run along the same lines. (I have yet to try one of those. I can absolutely say I'll exercise and record my food, but I can't promise I'll lose weight.)
THAT is not a problem!
(As long as I'm not penalized for going over).
Join in and link up!