7/10 the LURK instance is an example of this
https://lurk.org is an art server. It started out of a concern about the wall-gardening of archives, knowledge and engagement that occured as art related net-communities, including those who had been supportive of FLOSS, moved to mainstream proprietary platforms such as slack and facebook groups. We begun hosting mailinglists that were hosted on disappearing artist-run servers. Then we added web chat and XMPP, wiki, streaming services, and other things that used to be common for us, so as to renew with the partly forgotten practice of self-hosting, and DIY net infrastructure (see https://artycok.tv/43863/de-platformizace-etika-a-alternativy-socialnich-medii).
As the fediverse became a thing (again, hello identi.ca!), we started post.lurk.org.
Our instance runs a modified version of Mastodon called Hometown (shoutout to @darius who maintains it) and about 350 people lurk there. Like the rest of LURK, the instance is about (proto-/post-) free culture, experimental, new media art, net and computational culture, and things like that.
https://post.lurk.org is but a tiny part, there are other instances similar to ours! (sonomu.club, merveilles.town, videos.scanlines.xyz, node9.org, social.servus.at, etc)
We believe that the balance discussed earlier between the field of art and culture production and the tech industry, specially the sectors busy with computer technology and network services, is currently broken. It reaches the point where the field of art and culture production is ultimately shaped by social media platforms and novelty software as a service.
At the same time this shaping does not mean knowledge and practices from art and culture inform the platforms they depend on in return. But rather the shaping acts to maintain certain privileges and economic systems in place. Think how decades of pedagogical thinking have been thrown out of the window in the sudden rush to do everything on Zoom (https://constantvzw.org/wefts/distant-elephant.en.html).
It does not have to be like this.
Welcome to post.lurk.org, an instance for discussions around cultural freedom, experimental, new media art, net and computational culture, and things like that.