arieng - 4:30 pm on Feb 9, 2010 (gmt 0)

Thanks, you've hit at the heart of what I'm getting at but I feel quite the opposite. I think that e-commerce is easy in that you have tangible products you are trying to sell. Selling ads seems much more difficult to me.

In ecommerce, I'm focused on the conversion rate, average order value, and ROI of every traffic source. If these metrics combine to a certain value, I'm going to be profitable.

The media world doesn't seem as cut and dried. What will be the key metrics to success?