The main argument for conversion vs. startup has been #networkeffect, which has been a huge barriers to previous attempts to knock out #facebook & #birbsite, though I think the affinity-based instance design of #mastodon offers a pretty effective mechanism for N-E bootstrapping.
#socialcoop happy to share that established co-operative in the UK - the #phonecoop - has announced a Foundation to support co-operative innovation (including #platformcoops) led by their departing CEO, Vivian Woodell
And show a bit of love if you are on #birbsite: https://twitter.com/Cooperator1/status/876739596096331776
This article misses the connection around the emergence of the #socialcoop #instance out of the #buytwitter campaign, but is otherwise a solid look into the rise of user-owned #socialmedia: http://www.sfchronicle.com/business/article/Done-with-Facebook-Twitter-User-owned-social-11226613.php
Got close to 5% of the vote last month for our shareholder resolution calling on #twitter to do a feasibility study on options for converting to user ownership. @ntnsndr's article in the Guardian back in the fall really kicked the campaign into high gear. #birbsite #platformcoop