Comment by psionides

https://www.blackskyweb.xyz - it's the black people community on Bluesky, they started first with some custom feeds and blocklists/labeller, now they have a PDS and relay, and they're planning to launch a forked version of the app and eventually have a full independent infra basically. With some extra features like option to make "internal" posts that aren't shared with the wider Bluesky but only with people on the PDS.