tl;dr: The developer of Conversations, a paid federated XMPP client for Android, is making the app free on Google Play after years of frustration with Google's opaque review process, arbitrary rejections, and 14-day update delays that endanger security patches. Having secured grant funding through 2029 (via NLnet and the EU), he's no longer economically dependent on the ~1000 EUR/year in Play Store revenue and is pushing users toward F-Droid, where the APK is now built reproducibly and signed with his own key.