Comment by dessant

Maybe it's not your intention, but from your comments it comes across like you're putting very little value on other people's work. It was probably a substantial effort that took years to bring these projects to the usability and popularity that they achieved. Again, i'm not sure why did the user above find it problematic to have a paid version of the app on Google Play, and the same version with the same features distributed for free on F-Droid.