I really love 
this, @jeffz and I feel it is a very inspiring example of how linked data can be applied in new and interesting ways (so that’s a nice follow-up to what I just wrote in topic Is RDF “hard”?).
There’s a very broad applicability to this model, that goes beyond “organizations” (though it depends what semantic meaning you attach to that term, I guess). Thinking more general about the social benefit of any Actor (ActivityPub terminology) or Agent (Valueflows terminology) that touch on my interest areas.
I’m involved in preparing a new (crowdsourced) initiative called Social Coding Movement (not yet launched, will be somewhere later this year) that focuses on the social aspects throughout the entire Free Software Development Lifecycle. Software that focuses on real human needs is an important aspect, but considering the social benefit of a project organization that delivers the software is equally important.
So I will take this into consideration for that effort. These kinds of models come into play when building supportive tools for social coding, and where we want to wield the Fediverse to roll them out. Another potential Fediverse application applies more universally: the Fediverse consists of 1,000’s of servers, called Instances, where the member base of an instance forms an implicit community. Instances may have a specific theme, but more importantly they have their own Code of Conduct and moderation policies.
I am advocating to decouple “Community” as a ‘fediverse-native’ concept from artificial server boundaries, by having communities be represented by Group-type Actors and also be able to better represent the intricate ‘social fabric’ of real life by letting them have meaningful Relationship objects to other Actors. The Social Benefit model may play a role in that too, by defining Code of Conduct and ‘purpose’ in general in machine-readable fashion. Apart from that, and as something to be modeled on top I am interested in a concise “Governance” so you’d be able to shape ‘democratical community governance’ on the Fediverse.
Will post your article to some other people whom I know will be interested in it (like Bonfire and aforementioned Valueflows teams).