Why not count referrers for site-wide blogs?

[Dave]

re: http://opensource.atlassian.com/projects/roller/browse/ROL-1347

While investigating Matt's report fo referrers no longer working, I
came across this logic in for referrers in the PageServlet:

       // if this came from site-wide frontpage then skip it
       if(RollerRuntimeConfig.isSiteWideWeblog(pageRequest.getWeblogHandle()))
{
           return false;
       }

What's the reasoning behind not counting referrers for a site-wide
blog? Seems to me, a site-side blog has referrers too and if referrer
counting is enabled it should happen on the site wide blog too. No?

- Dave