Carrotmob is a method of activism that leverages consumer power to make the most socially-responsible business practices also the most profitable choices. Businesses compete with one another to see who can do the most good, and then a big mob of consumers buys products in order to reward whichever business made the strongest commitment to improve the world. It’s the opposite of a boycott.
See how it was organized for the very first time in Brussels
http://brussels.carrotmob.org/

http://www.indymedia.be/files/Carrotmob_Brussels_final.mp4