Make Money With Adfly by giving away free ebook

Adfly is a legit program to make money by shrinking link. Click to  Join Adfly

This is something related to my future project. I am going to write an ebook which can be given away for free. The ebook will have an adfly link inside it. 

Why make money adfly with free ebook? 

1. Because it has a passive factor.
2. As long as people read and click we will get money

Why free? 

Because many people like free information.