I know, right? I never contributed to Nix Documentation, or any major contribution to Nix ecosystem (just minor nixpkgs stuff, and have been interacting with community for some years). My opinion: NixOS Foundation needs processes in place to deal with conflict of interests, and [mis]communication, [mis]understandings… There should be a clear separation between community/foundation/nonprofit and third-party/companies/for-profit interests. There needs to be more organized transparency. People can see the issues when processes for dealing with that are not in place.
Besides, I would like to ask for more information on what the NixOS Foundation/Stichting owns, controls? What about Nix/Nixpkgs/NixOS · GitHub and the projects/repositories on it?
As already mentioned, maybe the Nix community could learn with GNU Guix?
PS/Edit: I like to assume good faith. We need to be kind and see things through a processes lens to improve them. It seems important to consider sustainability issues in a genuine and transparent way. For the NixOS foundation/community AFAIK has been surviving on volunteers work, OpenCollective, companies sponsorship, …