Weird idea: make the Amethyst version is the PlayStore a paid app. This should "force" most people to install Obtainium and update via APK because its free and Android users hate paying for apps. Both the play store and Obtainium would be the exact same app shipped by the same person at the same time.
If you like Google's lock in, you are free to pay and help fund the project. If not, the alternative is just clicks away.
What do you all think? Will this help people decentralize themselves? Or are most folks not ready to de-google themselves?