Flatpak has always been the Red Hat controlled play in containerized app packaging. Red Hat floods Flathub with auto-generated Flatpaks based on their RPMs. Flathub is becoming an app store with an obvious intention of becoming "the" Linux app store, displacing distro packages. Centralization is the whole idea. No significant number of people will ever use Flatpaks from anywhere except Flathub - unless Red Hat makes its own Flathub.