Last week, Mashable published an article about the value of a Facebook fan.  This article has been shared thousands of times and reposted all over the marketingverse, and I'm terrified by the implications of how may people have read it (more on that later). Using a CPM model, Vitrue calculated that a Facebook fan is worth $3.60.  Here's the math: from: Mashable There's one problem: This is NOT how Facebook works.