Ownership and licensing of the articles posted on SSRN: principles for reassuring authors

AuthorsAlliance.org, here.

It’s the Data, Stupid: What Elsevier’s purchase of SSRN also means

SavageMinds, here. 

Elsevier acquires online community SSRN

TheBookseller, here.
See also here.
See Elsevier's post here.
There is somewhere a lesson to be learned about how communities are formed and monetized in the platform society. Moreover, would authors respond/react by increasingly disintermediating (own blog, other more "private" repositories, etc.), possibly? Or what about a broader ArXiv?