Sweet, I'm always down for free stuff.
How could this be implemented into the site though? Hmmm, alright a few ideas to spitball in your general direction.
The obvious is the prediction league and has already been mentioned, so I will skip that.
Two other ideas involve one of VGCs greatest assets, it's community of funny, informed, and insightful members. People can be rewarded for their contributions to the site. I can think of two ways to do this.
(1)Monthly essay contest. The site is always looking for well written editorials and good writers to present them. This could be done either by giving a relevant topic for the month for people to muse on and then send in entries, or by making it completely open and people can write about whatever. Obviously guidelines would be given. Say 750-1000 word essay, limited profanity (but feel free to throw in a little bit of color), so many pictures allowed if any at all, ect. At the end of the contest period a group of site contributers such as the source, rocketpig, benga benga, Naznatips, y-koron or whoever vote on the best editorial and it gets posted front page, along with the reward of the game. The site gets well written articles from numerous sources, it encourages contribution to the site, and draws the community together, as well as possibly pulling in new users or lurkers. Everybody wins.
Idea (2) Something as simple as a popularity contest. Once a month people get to vote for their favorite users, winner gets free points. This would again draw the community together, but also encourage users to be friendly, funny, helpful, and intelligent in their posting. Certain draw backs include less scrupled posters trying to rig it by finding a way to vote for themself over and over, or other site hacks/flaws, or soriku just getting free wii points every month. It would take careful monitoring to make sure it stays clean and fair.
Personally, I think the first idea on essay contests being the better of the two, but I'm just spit balling here.