Even so, one isn't a company in the usual sense, and if there's a gap in the sizes, it's between Wikipedia and everything else.  Wikipedia is the 6th most popular site on the web.  vark.com doesn't break into the top 20,000.<p><a href="http://siteanalytics.compete.com/wikipedia.org+vark.com+quora.com/" rel="nofollow">http://siteanalytics.compete.com/wikipedia.org+vark.com+quor...</a><p>As others, I suspect this is more the Silicon Valley attention bubble than astroturfing.