Reporter Abby Prince of WebProNews caught up with Sam Harrelson, the Publisher of ReveNews, and Stephanie Agresta, partner with The Conversation Group, at the BlogWorld and New Media Expo in Las Vegas. Both Agresta and Harrelson discuss why affiliate marketing could be called performance marketing. They differentiate between CPA, CPM, and CPC and talk about the importance of building good relationships with affiliates. Catch all the details, only on WebProNews.