It's worth pointing out that OpenStreetMap has Microsoft, Amazon, Apple and Facebook and many other corporate contributors and they are contributing huge amounts of data, all the time, everywhere.
"Apple Maps, is by far the most prolific current corporate editor and was responsible for almost 80% of all edits to pre-existing roads in 2018."
This bandwagon only happened because OSM gained traction, sometime in the 2010s. Sure, popularity breeds more popularity, afterwards. Even for all this, the biggest single event that boosted interest in OSM was, ironically, Google imposing far stricter gratis limits on its Maps, a few years back (2018, IIRC?)
"Apple Maps, is by far the most prolific current corporate editor and was responsible for almost 80% of all edits to pre-existing roads in 2018."
https://www.bloomberg.com/news/articles/2021-02-19/openstree... https://www.openstreetmap.org/user/Jennings%20Anderson/diary...
Openstreetmap has never been volunteer only, but to be fair its only in the last decade that we've seen this change.