On the first Monday of March I received an email from Nabisco. The email was an invitation to become a fan of Nabisco Cookies on facebook. Actually it was more than an invitation —it was a fan bribe. Nabisco is offering free cookies,sort of,if I become a fan. The email made me wonder how well bribes work. Secondly,if someone does join based on a bribe,how much of a fan of the brand are they? [...]