[alanctgardner2]

Because Steam sales have driven the prices of games up by 50%. Oh wait, no, AAA games are still $60, but now Steam offers them at a reasonable discount after a few months to undercut the used-games market.

Getting kicked out is a point of friction, where a user could either start torrenting, or buy the game legitimately. If they can prove that a small discount improves conversions, I don't see why they wouldn't offer it. Steam is all about removing friction by offering discounts.