Whopper Sacrifice

Whopper Sacrifice was an advertising campaign developed by Crispin Porter + Bogusky for Burger King, launched on Facebook in January 2009. The campaign's Facebook page would award users a coupon for a free Whopper after unfriending 10 of their Facebook friends. Sacrifices were made known via posts reading, “(Participant) sacrificed (victim) for a free Whopper,” and unfriended users would be sent a notification informing them they had been sacrificed. Facebook typically does not notify users when they are unfriended, out of privacy concerns, so the latter feature eventually prompted Facebook to disable the promotion 10 days after it had launched.