That also makes no sense. Using systemd does not fundamentally turn your distro into Fedora. There are several distros that aren't Fedora that have established

That also makes no sense. Using systemd does not fundamentally turn your distro into Fedora. There are several distros that aren't Fedora that have established use of systemd, and there are several companies selling support offerings around those other distros. In reality, all these distros have come together to work on it jointly as an open source package, which is just a small part of your overall Linux distro typically made up of thousands of packages. By comparison, I don't believe any companies are selling support offerings for open source Darwin, not even Apple.