On iOS, Go Map!! has a mode which shows quests like StreetComplete. https://wiki.openstreetmap.org/wiki/Go_Map!!

An iOS version of StreetComplete is also in progress. If anyone is a developer, go help them out! https://github.com/streetcomplete/StreetComplete/issues/5530

OpenStreetMap data is “open data”, licensed under a copyleft license. If a company were to acquire the project, it legally couldn’t add restrictions to its use, nor use it in a proprietary dataset.

Also, OpenStreetMap is governed by the non-profit OpenStreetMap Foundation, which any active mapper can become a voting member of. Corporate buyout of a democratic body like the Foundation seems unlikely.

Lastly, major companies like Meta, Microsoft, Apple, Amazon, TomTom, Niantic etc already rely on this data. Most of them are corporate sponsors of the OSMF and help keep the servers running. 🙂 https://osmfoundation.org/wiki/Corporate_Members