To everyone saying you can’t mirror a flatpak repo… you’re absolutely right. There should be a far easier way to set up your own mirror without needing to build everything from scratch. That being said, if you wanted to try to make your own repo with every one of flathub’s apps, here you go:
https://docs.flatpak.org/en/latest/hosting-a-repository.html
Edit: Some did get a flathub mirror working. The issue is that a. Fastly works good enough and b. There is no concept of “packages” on the server side. It’s just one big addressed content store because of ostree, and syncing is apparently difficult? Idk, not being able to sync the state of content is like the entire point of ostree…
It’s not about funding. Many prefer mirrors because the main instance isn’t globally available (the GitHub issue I linked, for example, is all about people trying and failing to access flathub in China) or because they can’t for compliance reasons (many businesses already mirror stuff like epel, too, which is what throws off Rocky’s stat counters). Neither of those issues can be assessed by throwing more money at a CDN.