YSK: On the App Store, some poorly-reviewed apps will push occasional "bug-fix" updates to hide their bad rating

You may have noticed this when Pokémon Go was tanking and they would push "minor text fix" updates to reset ratings.

I discovered this myself, but here's a source if anyone wants to read about it.

Also worth mentioning, correlation doesn't equal causation; some could merely be a coincidence

(I can only confirm this for iOS, not Android or otherwise)