A problem with "social networks", and perhaps the Internet in general, in my opinion, is that they encourage groupthink.

> Each vote costs 10¢ and the payment is distributed amongst earlier voters.

This sort of pyramidal scheme actually gives people a monetary incentive to try to vote how others will vote, regardless of their actual opinion. Like other gambling, it may be a good business model, but it serves to exacerbate the groupthink problem.