

Web Fishing comes to mind for me. Idk if it even has monetization besides ads on the web page. It is rather rare though. Warframe was great but when I played leveling each piece of gear was too much for me. So it wasn’t even the monetization it was a game mechanic. Phenomenonal gameplay though. I wish it was more about that than leveling.
The steam version. You can just play it in the browser. Its was originally only that. So maybe the steam version is also a form of monetization.
I wish I could get into Warframe more but seeing all that to do just makes me shut down.