Cumulatively, this is journalism. Perhaps not the journalism we knew, but the journalism we are bound to know in the time ahead. It collects our behaviour --- without relying on us to gush about a product or service --- and produces the notion of value and relevance.
Even tagging photographs on Facebook essentially builds someone else's Web brand. Rosenblaum calls it "passive endorsement" or a crowd-based curation.
He sees it as an alternative to the professional, expensive curation.