A Facebook subscription button placed on your site will allow subscribers to signup to your list with a single click. When a visitor clicks this button on your site, we will pull their email address from their Facebook account, it is that simple! They do not have to even type their email address.
Use the "Subscriptions" option from the main menu.
Select the "Facebook Subscribe Button" and give it a name . Select the target list(s) that you want this button to send new signups into. Click "Create subscription" button.
Note: First-time users may receive a pop-up Approval Request (prevents SPAM)
Here you can configure parameters such as:
Simply copy/paste the IFrame code into your site.