On the Popularity of MLS on Facebook

Today,  Futebol Finance released their list of top 25 clubs with the most fans of Facebook.  The results aren't too surprising, with the top 25 dominated by the usual suspects of European and South American clubs.  MLS failed to crack their top 25 with a small footnote that Real Salt Lake had only 37,000 fans.  RSL are an odd benchmark, given that the Seattle Sounders lead the league in attendance by a considerable margin.  As of 11/8, Seattle Sounders have 130,000+ fans, putting them at #22 in the world.  What about the Beckham effect?  LA Galaxy have less than 28,000 fans.  At least Seattle can beat LA in something.