[paraknight]

Agreed, maybe he could design it such that those who maintain the longest streaks get bigger and bigger "dividends" from a pool of the accumulated dollars of other users. There may need to be some sort of anti-abuse system put in place for that too though.

[blackflame7000]

I have seen OPs concept applied to apps for workout regimens and the only app that I've really seen that was successful was one where those that went got money from those who didn't. I think that's kinda what you're describing paraknight and should be something to consider for the OP.