Congrats! I think you are the perfect person to give some feedback on a product I want to validate and build. If you have the time, please let me know what you think of this.

The product is a personalized Facebook app created for the ecommerce that aims to increase the number of emails collected for the ecommerce's newsletter and increase traffic from these newsletters by sending Facebook notifications to the users that signed up to the app.

Basically I create a Facebook App and provide the sign-up link to the ecommerce. The ecommerce adds the link next to the "Sign up to our newsletter" CTA they usually have on their website giving the user two options to provide their email: the regular input field and the link to do it via Facebook (this is not a Facebook Login btw). If the client click the link, they are directed to Facebook's authorization page, one more click I have the access to their email and the ability to send them notification (only if the user is accessing Facebook on the web, as FB do not send app notifications to native mobile apps).

I then send the user's email to the ecommerce and send FB notifications everytime they send a newsletter (linking to the web version of the newsletter).

So, what dod you think?

Please teach me.