You could be onto something here... what you have enumerated seem to be examples of various forms of "Social Proof" (for lack of a better way of saying/defining it).
It would be interesting, highly interesting, I think, to try and enumerate all of the possible forms of Social Proof.
You've definitely nailed 4 of them -- but are there others? What if we broaden our search outside of the VC world?
Whatever the case, whether we call this "Social Proof", "Trust as it manifests in the world of VC", or some other name/nomenclature -- I think you're definitely onto something here...
It's sort of like what you've said could be the summary/abstract of a Ph.D. paper. That is, I think there's some more knowledge to be gained by exploring this set of ideas further, perhaps in writing, perhaps in blog article, I don't know...
But I do know that you're definitely on to something...
I would love to see more exploration of what you've just said...
There's definitely something there...