From a comment on the Google+ discussion came this corroboration, of sorts, from Gabe Newell. http://www.geekwire.com/2011/experiments-video-game-economics-val

From a comment on the Google+ discussion came this corroboration, of sorts, from Gabe Newell. http://www.geekwire.com/2011/experiments-video-game-economics-valves-gabe-newell http://www.geekwire.com/2011/experiments-video-game-economic... Too many details to sum up nicely, but one is that when they did not advertise prices changes for CS they say almost perfect elasticity.