TWRoO on 18 February 2008
From what I can tell, it actually looks pretty fair to me.
Yes you can get money on something with only 50% accuracy, but only if you are better than the majority.. If the prediction is hard (ie most people failed at it), then you are rewarded for getting in the general ballpark, wheras if it is easy you have to still be better than most people to gain money.
It all seems perfectly fair to me.
