It serves 2 good things.
1. The charity that receives the money.
2. Someone (the winner) gets to see all sorts of new tabs on his/her screen. And hope they don't click the wrong one.
Who ever wins, will have plenty of help. And Admin can undo almost anything we do.
Its more of a democaracy then people might thing.
Robo won the first mod contest however many years ago it was.