@Crissy I'd say an instance owner effectively owns the posts and follower relationships. Specific server implementations allow moving followers, but others don't since it's not part of the ActivityPub protocol. Moving posts is currently not possible because the post and "actor" identifiers are bound to a specific host domain. Mastodon allows exporting posts, but they can't be imported into other servers, even Mastodon servers. There are attempts to address this issue, but we'll see.