Google AdSense started conducting email interviews; currently available to North America publishers to better understand what's most important to publishers. If you're located in North America, you can sign up for a chance to participate in an email interview and openly discuss your opinions about AdSense with a market researcher. Participants’ll receive a $50 AdWords credit for their time. “We'll be contacting chosen participants via email; because space is limited, we won't be able to accept all applications,” announced.