To cooperate is a good idea when the vision is shared. That implies that partners must understand Wikimedia vision and collaborative, volunteer projects.
Opt-in/Opt-out clauses should be implemented when negotiating such partnerships. We have a lot of doubts about the possibility of having an external partner as a thematic hub for Wikimedia movement. To release data in Commons or Wikidata is not being part of Wikimedia movement, We have values broader than 'just editing' or using certain platforms.