I'm surprised it's considered social media. I only go there looking for work. Sure there are some posts that are social. But seems mostly geared to getting jobs and networking from a business perspective.
I see your point. The difference for me is the substance of the content. If the site was geared towards just something it's just a website. But it having content about anything makes it kind of social to me. I hear you though. I see where many of these don't fit into social media.