Also with mobile apps, app store users are the most "valuable" thing -- much like Maps.Me, the "app" could be sold tomorrow and what really happens is the FOSS code is thrown away or sunsetted and the users wake up to an update where their map app is now a crypto scam, or whatever. The source code can be forked, but Organic Maps "owns" millions of app store users, and can "sell" that, in a way that violates users' trust. Us volunteer developers are very against that, but unable to stop it besides protesting.
Happened with Firefox. Mozilla now has unlimited rights to use and publish, anything you see, type or upload in Firefox. And it is still marketed as "privacy" friendly. Even Micro$ft has better license in their browser!