Every year, brand survey company Brand Keys conducts polls to test a consumer’s loyalty to a specific brand. There are a large number of categories, ranging from favorite allergy medicine to favorite hotels or airlines. The most intriguing, however, is usually Brand Keys Sports Loyalty Index, which is about fan loyalty of specific sports. According to their Web site, “The Brand Keys Sports Loyalty Engagement Index® helps professional sports teams increase their broadcast, ticket and merchandise revenues by providing....