Since its inaugural season in 1996, Major League Soccer has exceeded all expectations in terms of growth. While not on the level of the NFL or NBA, the MLS has sparked rabid fanbases for its 20 teams (with four more slated to join by 2020).
One of the league’s most popular teams, the Seattle Sounders regularly lead the MLS in attendance with an average of more than 40,000 supporters at regular season matches. This kind of impressive loyalty, according to a recent Loyalty360....