Katie's Cards -- a subscription eCard company -- is the case that proves you can make money from exceptionally high quality content, even in a market flooded with free stuff. The company profits from a mixed business model, selling similar content to consumers through low cost subscriptions and to businesses through high-priced one-off sales. Marketing Manager Racheal Ellis spoke with us about the site's A/B test results and Facebook integration. Plus, learn why you need to add new online tools ...