On Mastodon, by way of example, tiny teams or people today run impartial communities or "instances" on their own servers, and they've their particular moderation policies. But they even now must comply with the ActivityPub protocol. There are times through which It appears oh-so-evident that tech bros like science-fiction flicks. https://econopass.com/news/world/is-the-fediverse-a-threat-to-centralized-social-media-platforms/