Social Media and News aggregation are not entirely different things, right? I mean, in the sense that News (and other link) Aggregation was one of the things that grew into Social Media. I think you are right to say it is more of an aggregation site, but also it’s worth nothing that in Digg’s heyday, Social Media was barely a thing.

Social networking was a thing. Social networking, link aggregation, discussion boards—it’s like pouring milk, hot sauce, and vodka into a vat to get Social Media.