In 2009, Denny's shocked America by offering every customer a free Grand Slam breakfast after a Super Bowl commercial. The promotion drew massive crowds and became one of the most talked-about restaurant campaigns of the year. But while it generated incredible attention, it also changed how customers perceived the value of Denny's signature meal. It's a reminder that great marketing can sometimes create unintended consequences. Watch the full video here: youtu.be/XKECdXnqKLc #dennys #superbowl #marketing #business #restaurants