Then they aren’t federated and likely won’t see posts, right? If instance A defederates from Instance B, no matter what instance B does, they don’t talk.

It’s going to be hard to get people on board with the fediverse. It’s just not as user friendly. It’ll be a cool niche but it’ll never be a Reddit-size product. Which, maybe that’s totally fine. Maybe we get better conversations here due to that.