After Henry Blodget fired editor John Carney from his role as the editor of Clusterstock last week, some clearly felt that Blodget, the Business Insider cofounder and CEO, owed an explanation. Blodget and Reuters finance blogger Feliz Salmon got into a Tweet-spat, which culminated in Blodget serving up something like a master class on New Media Economics Friday evening. Blodget was direct, laying out the numbers behind running a web site. His arithmetic checks out-but that doesn't mean his math makes sense. READ MORE