Wow, fascinating! I appreciate the extra work you did to add more nuance and detail to what Lanier proposes. The Atlantic article focused more on the interpersonal aspects of MIDs, like group norms, processes of interaction, and structure. I hadn't considered some of what you shared here, specifically the financial pieces. HOA's but for online activity sounds unpleasant.
It seems like they're proposing a platform that would allow for free speech, except limit its visibility to the group/community. This would reduce the prevalence of psy-ops, where social media has been manipulated and weaponized to fuel social division by mixing all types of content into one feed. Yet reading this post, I'd much rather try to make Hive the next big social media platform. It seems as though Hive can accomplish much of what MIDs are meant to do. It would be interesting to see what Lanier and Weyl think of Hive.
RE: Introducing Mediators of Individual Data