Gettr is the only one of those you can really be booted off of. Mastodon is federated. You can host your own node if you want to. Matrix too, but I wouldn't ca

Gettr is the only one of those you can really be booted off of. Mastodon is federated. You can host your own node if you want to. Matrix too, but I wouldn't call it a platform. It's more like XMPP.