Chattanooga, Tenn.’s Riverbend Festival has posted a 40 percent increase in sponsorship revenue as a result of a two-year-old consumer rewards program aimed at improving relations with local businesses. The nine-day June music festival launched Riverbend Rewards in 2010 to build relations with local restaurants, attractions and other businesses, some of which see a decline in traffic during the downtown event. “Festivals that are located in public locations need to figure out new way...