The problem is that splitting the app in this way is so very lucrative. Disallowing players from enjoying a game without paying doesn't work for everyone, but

The problem is that splitting the app in this way is so very lucrative. Disallowing players from enjoying a game without paying doesn't work for everyone, but the network effects of multiplayer games virtually assures an increase in sales once your game passes a threshold of popularity. The tradeoff, however, is that this won't work for small and niche games. For players to convert to purchasers the value must appear sufficient, and a multiplayer game with no players has little value.