I still think it shouldn't have been actual cash rewards.
Honorary rewards which allow special recognition in the game should have been enough. Then all the bitterness, the vulgar nature of score whoring could have been a lot less.
When people would receive honorary, special rewards for being top in the score, to people who are interested in high scores the specialty of such rewards would mean something good, and to the people not interested, it would just stay that way.
However the moment it involved money, it started rolling downhill. Scorn, disrespect, madness, greed, hostility, dog-eat-dog competition...
Kinda funny isn't it, the fact that even a small community in a virtual environment tends to flow into the direction resembling filthy reality...