Hi Lucas, I thought about the ideas you told me and found one way which you could use.
It is possible to create users profiles which would give them access to "super" special offers for registered users only. You could get their email and at the same time give them an opportunity to log in and see "super specials"
You cannot access this page: specials
without being registered (you will be redirected to main page).
Well, to see the "super specials" users would have to sign up firstly: (just try it)