Wrote Protocols, Not Platforms which at least partly inspired Jack to move Twitter toward being a service on an independent protocol, which ultimately led to the formation of Bluesky
https://www.techdirt.com/2019/08/28/protocols-not-platforms-technological-approach-to-free-speech/
This month he joined the board of Bluesky
https://bsky.social/about/blog/08-06-2024-board