Most other companies would still nickel and dime the adults, though.

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.

The only real in-game purchase in Counter-Strike is the game itself to gain access to the ranking system. The skins are a superfluous add-on.

They knowingly profit from gamblers if you will but gamblers are going to gamble.

The gamblers were offered e-sport or gambling and they chose the latter.

You could use Robinhood to build up a growth portfolio starting from a handful of dollars or you could use it to buy 0DTE OTM options on credit. Guess which one the gamblers chose.