
Have you even up some day and logged into Facebook to find that you're one friend short than you were yesterday? Some of you might not even notice this, but for others, it is a big deal. Before Facebook, people used to compete with each other on Google's Orkut for the most amount of scraps. Now, some people compete for friends (I did that too, once long ago :P). Competitions aside, every Facebook friend and fan is extremely important to marketers. While there's no shortage of people to befriend from Facebook's inventory of 901 million, it is important to retain the ones you already have.

