By now, everyone knows that brands pay big bucks to air commercials during the Super Bowl. This year, advertisers shelled out roughly $7 million for a 30-second spot, for an estimated total of $650 million, according to estimates by the Sports Business Journal. A feel-good parade of humor, nostalgia and celebrities accompanied the Feb. 11 event that generated relatively little controversy — unless you count the mixed feelings over pop superstar Taylor Swift cheering on her boyfriend, Kansas City Chiefs tight end Travis …