I think the gamification or making it something addictive is a good idea. If the crowd is actually people already doing it, I would be curious to know what that TAM is and if it's something that is growable.

Essentially you are making a cognitively heavier Reddit/facebook feed/digg etc... that also assumes each side has equivalently quality content.

Good luck, I think this is something needed but it's probably in the hardest camp, with toughest monetization.