I just created a blog post based on the article of Joel Polsky. His article was basically addressing startups but many aspects of it are very relevant for social enterprises, too.
https://www.seincubation.com/post/a-fair-way-to-divide-up-ownership-of-any-new-social-enterprise
It might be different when the legal form of a social enterprise is an association or other typical NGO formation but even in this case I always recommend to clarify clearly the issue of ownership, IP rights, and leadership.
a great article, very helpful when laying the next stage of a startup or enterprise.