In 2009 Naked Pizza a multi-national pizza restaurant company launched a microblogging (Twitter) campaign about its pizzas. Billboard outside shops encouraged customers to follow Naked Pizza on Twitter. In a short time the campaign drew about 4000 followers. The campaign’s succes was demonstrated in that the company broke its one-day sales record, with more than 68% of its sales coming from customers who were Twitter followers. 85% of customers on that particular daystated they had been motiva...