KFC's Free Meal Debacle via Oprah
KFC offered a vastly over-subscribed FREE MEAL coupon to introduce their new Grilled Chicken, which was cross-promoted through the Oprah website.
People were making multiple copies of the downloaded coupon. The demand for the meals overwhelmed the restaurants, which ran out of the promotional product. Some stores substituted while others, hit with overwhelming expenses, stopped honoring it.
Meanwhile KFC's president Roger Eaton revoked the promotion with a smile but sold consumers on how much they're going to love it when the grilled chicken does come.
He's still working on the Kentucky accent thing.