@oiram15 It has to do with the way federation works. If nobody on instance A is following an account on instance B, the account on instance B’s posts won’t start showing up on instance A until that changes, and even then, it’ll only receive posts from that point forward. There are mitigating factors like boosts and relays, but that’s the gist of it.
I’ve heard good things about Hetzner, though I’d be remiss if I didn’t point out that SDF offers VPS services.