Whopper Sacrifice, Burger King's Facebook Promotion: Delete 10 Friends For Free Whopper

Burger King has created an application for Facebook that allows users to delete 10 friends in exchange for a free Whopper.

Taking Klondike's "What would you do for a Klondike Bar?" motif to the next level, Burger King invites Facebook users to sacrifice 10 of their friends on the social networking site for a coupon for a free sandwich:

"What would you do for a free WHOPPPER? Now is the time to put your fair-weather web friendships to the test. Install WHOPPER Sacrifice on your Facebook profile, and we'll reward you with a free flame-broiled WHOPPER when you sacrifice 10 of your friends."

Sacrificed friends show up in a user's news feed.

The effort crafted by Crispin Porter + Bogusky came about after agency creative staffers confronted the too-many-friends scenario themselves on Facebook.

"We thought there could be some fun there, removing some of these people who are friends [but] not necessarily] best friends," said Jeff Benjamin, executive interactive creative director at Crispin, and friend to 736 on Facebook. "It's asking the question of which love is bigger, your love for your friends or your love for the Whopper," he said.

The app also adds a box to user profile pages charting their progress toward the free burger with the line, "Who will be the next to go?"