SolSoCoGI saw someone mention a mastodon.art post and I just went through their about page for fun. Their blocklists reads like a almost complete instance list by now. Also by their own ruleset they should have blocked mastodon.social and mastodon.online by now because they do federated with a couple of hundred instances they have blocked. But they know that would cause a mass migration away from #mastodonart . I don't know why people still register there with -80% reach compared to sane instances.
GNU social JP is a social network, courtesy of GNU social JP管理人. It runs on GNU social, version 2.0.2-dev, available under the GNU Affero General Public License.
All GNU social JP content and data are available under the Creative Commons Attribution 3.0 license.