Steve Henn and Zoe Chace, on Planet Money:
Those ads went viral. They got twice the usual number of click-throughs, on average. The ad showed up more than 700,000 times. Basically, everyone in New Orleans on Facebook saw it. Twice. Pizza Delicious got close to 20 times the number of Facebook fans it usually gets in two days. The guys were stoked.
They didn't sell a single pizza.