Duolingo killed its owl, then made users earn him back
The stunt ended inside the product: users could only bring Duo back by doing lessons.
Jack
Burger King made McDonald’s the only place to unlock a 1-cent Whopper
The rival’s restaurants became where the deal happened.
The Ice Bucket Challenge turned every video into three invitations
Each video tagged three people and gave them 24 hours, so the challenge kept spreading.
Spotify turns each user’s listening history into an ad they share for free
Every card is a brag about the user, and the logo is on every one.
Dollar Shave Club’s $4,500 founder video took 12,000 orders in 48 hours
The founder roasted his own category, and the pitch became the joke people passed on.