Interesting interaction. Certainly more direct than I'd be but hey that's okay. One piece of feedback for communicating here is to relay the mission and vision you're trying to build. It's indirectly stated here when he states what their objectives should be, but without clearly laying it out there, there's no way for any collaboration to occur.
And this is not to say collaboration with Meta is a good idea, but just overall anyone can't know how to work with you if they don't know what you're building towards.