I have access to over 150,000 emails in a particular health / disease niche. Here are a few questions I have regarding this: 1. Out of the 150,000 emails, what is a realistic amount of people that will actually open the email and go to the site link in the email? 1%? and 2. By having access to the 150,000 emails, should this be a good reason to start an authority site with amazon affiliate / adsense ?