Add customers to your AWeber email lists.
Allow customers to sign up for your email newsletters by adding an opt-in checkbox to the user registration form of your Exchange store.
After uploading and activating the AWeber Add-on, click the settings gear on the Exchange Add-ons page to configure your AWeber Settings.
Click the button to get your AWeber Authorization Code and then enter that code in the next box. Select the AWeber List for adding your new customer subscribers and customize your AWeber Label (the message that displays next to the opt-in checkbox on the customer registration form) and select whether to check the AWeber box by default.