So I expect a good influx from traffic. I want to generate an audience by giving away an ebook for free that I normally sell on amazon. My plan was to get people to subscribe to my newsletter in order to get the Ebook by mail.
Then I was thinking about having them 'like' my site via facebook and tell them to send their email to my site's fanpage on facebook so they can receive the ebook.
Which option is better to generate an audience and why?