At the same time they leave a whole lot of money on the table by paying employees to work on projects that never come to an end, their big advantage is that someone has enough sense to have them support their products long term and to not have them release most of the incomplete products they could shovel out onto the market, contrary to Google.

Valve would have more money in its coffers by just making sure Steam stays the most used platform and by investing in ways to monetize stuff on it (cards, in game objects…). I’m sure they didn’t end up making profit from the Steam “PC”, controller, VR headset, Alyx…