Originally posted by another user
"We've been toying with the idea ever since the Mann-conomy update, where we added the in-game Team Fortress 2 store. Over the years we've done a bunch of price experimentations with the game, going all the way down to $2.49 in our random one-hour Halloween sales. The more we've experimented, the more we've learned there are fundamentally different kinds of customers, each with their own way of valuing the product. Now that we're shipping it, it feels like a fairly straightforward next step along the 'Games as Services' path we've been walking down for a while now."