To some extent, yes. But DF and ADOM are direct counterexamples to this. They have been developed for decades certainly far beyond the point where the marginal

To some extent, yes. But DF and ADOM are direct counterexamples to this. They have been developed for decades certainly far beyond the point where the marginal value of a dev-hour has ceased to be worthwhile. Yet development continues. On top of that, there are quite a lot of very detailed community mods for games that are developed for free. The thing about games that causes them to diverge from regular economics is that it only costs time and expertise to enhance them. And obviously there are lots of people quite willing to donate that.