Here's the situation:
You have a good valuable free ebook that you give away on your site in exchange for an email opt-in.
It has it's own mini 'sales' page explaining all the good stuff about the book, with the opt-in on that page.
You want to build more email subscribers, but how do you get people who download the ebook who then read it to recommend it to friends, without them simply sending the free book over to them. Obviously you want those friends to opt-in too.
Any ideas for some kind of incentivised way of getting people to want to share the ebook's intro page with others?
Like for example, at the end of the ebook it says: Share this page with your friends and receive a second free report as a reward. (Is this even possible? software required?)
Thanks in advance