Linux application developer here. Obviously I'm not going to tell you which apps but there is a good chance whoever is reading this is using an application made by me. I fucking love the idea of paid apps and donations on Flathub. This is a killer feature for me and I will soon change the README.md of all my applications to say that Flathub is the only supported and official way to install my apps. I will also actively discourage my users from using AppImages, Snaps and AUR after this. This is a game changer and I expect more and more application developers to switch exclusively to Flathub because of this. Flathub won.