As someone who participated in an earlier iteration of this, I can answer that there was no "prize" (I don't think there was even a leaderboard on the first ite

As someone who participated in an earlier iteration of this, I can answer that there was no "prize" (I don't think there was even a leaderboard on the first iteration of this). I can't speak for everyone, but I participated mainly for two reasons, 1) to make sure a crappy compression didn't eventually effect my images I posted there 2) the geek challenge of finding which image was compressed