What are the average number of ads social networking sites sell per
year, the total worth of ads sold, and thus industry worth, and
average price per each ? note what type if possible (e.g. banner ads,
announcements, sponsors, local advertisers vs. national advertisers,
etc.). Please relay stats as specific to college sector sites if
possible, such as FaceBook, or Xuqa
(http://en.wikipedia.org/wiki/List_of_social_networking_websites) ?
even stats on just one of these companies rather than the whole
industry will do).