TBWA Belgium has a created a unique campaign for Pepsi. A Pepsi vending machine which doesn’t accept cash. Instead it is run on your Facebook Likes. You have to like the Pepsi facebook page & select your flavor, which will get you a sample of Pepsi.
This helps Pepsi know who their customers are, what are their preferences & their facebook data. Pretty cool marketing idea. Rather than just liking the facebook page, this type of promotion gives a lot of info about the customer to the company & they can target better.