I'm all for challenges because it helps to keep me focused and motivated (by the way be warned! I'm aiming for a 4 point day every day in March!
). But I wouldn't participate in a challenge involving money. It may sound silly, but because we all are in different stages of our weight loss - some are at the end of it and some are just beginning we're all losing weight at different rates. I would feel like I had an advantage over many others because I still consider myself at the beginning of my weight loss journey so of course I'm going to lose more and faster than many others. I know if I won I couldn't take money from the rest of you because of what I see to be my unfair advantage.
Now, I would have no problem being a spectator of the challenge if others decide they want to do it!