Last week, a number of popular apps went free in celebration of the App Store's fifth anniversary, with Infinity Blade II among them. According to publicist Laura Mustard, who spoke to AllThingsD, Chair's hit action RPG scored 5.7 million new players during the seven day promotion. That amounts to three times the normal number of downloads that the game earns in a week, which could earn Chair quite a bit of revenue in the form of in-app purchases. Infinity Blade II offers players bags of gold to speed up item acquisition and gameplay.Like many o