Facebook isn't an editor, though, it's a curator. You use them interchangably but I think there's a crucial difference. An editor modifies to inject their own standards into the work. A curator just includes or disincludes as-is.
That this story is driven only by an advanced self-adjusting Skinner box to maximize advertiser revenue, is very weird. You never expect sci-fi to be so mundane when it becomes reality, but it always is.