Comment by nativeforks
11 hours ago
The reason I included that note is that, as an open-source developer, I’ve seen many projects that weren’t actively maintained get picked up by bad actors as they modify the code and publish it on Google Play with ads or IAPs. I wanted to discourage that.
Other than this notice, MBCompass is fully licensed under GPLv3 or later.
The sum of the note and the gpl doesn't behave as though the notice has any precedence over the gpl. It behaves as additional restrictions and a license that allows you to ignore the additional restrictions. I'm no lawyer but it seems like it isn't achieving what you want.
Maybe look into dual licensing. You could allow all free use but require a custom license fee for all commercial use.