I wonder if you could have an instance federated to every other instance just for archived purposes, to save the data on every other instance’s post and comment. Because copies of posts and comments are saved to federated instances, too, right? Or do I understand the tech wrong?

So it could have an admin team but no users, to prevent people worried about spammers and bots joining that instance to get around defederation rules. Maybe it just has a bot that crawls Lemmy, looking for instances to federate to. Could that work?