If you check one graph down below on the page, you’d find that in 2021 amount of games released was around 11k which is quite a bunch of games released in a year. By 2024 amount has doubled.

I don’t want to make any statements, but my speculation would be that most of these games are UE/Unity asset flips or/and AI generated garbage that is worth no one’s time.

If only major devs and solid indie devs are considered, revenue gap would probably be much narrower.