They still do that, Valve popularized the concepts of battle passes (with Dota 2) and loot boxes (with Team Fortress 2). They also took a paid game with TF2 and added all that monetization after the fact.
Counter-Strike especially has a pretty nasty gambling scene that Valve refuses to control, even though its only possible because of their marketplace and APIs.
Counter-Strike especially has a pretty nasty gambling scene that Valve refuses to control, even though its only possible because of their marketplace and APIs.