Not bad for a company with a free product and "no desire" to advertise. Xfire joins Viacom's other gaming assets Neopets and GameTrailers, both of which continue the "gaming community" theme, which means we can guess at MTV's plans for the future. They want gamers, whole communities of 'em, to extend their reach to those disaffected generations who shun the TV for games. Either that, or they've a nefarious plan that involves an evil robot gamer clone army -- you decide.
[Update 1 - fixed typo, thanks SeNiLe]