IGN estimates that Facebook games CityVille and FarmVille make more than multi-release console franchises like Madden 11 and Halo: Reach.The data comes from a combination of a 2010 NPD report that claims 10 percent of Facebook gamers pay real money and a microtransaction company's estimate that the average player spending real money spends $55.With that figure, IGN turned to the monthly active user count Facebook keeps on Apps and calculated what the top games made -- then charted it alongside 2010's best-selling console games. Here's what they came up with.No way to prove that it's true, being that it's all estimates. But it's still a pretty interesting idea.