E-junkie is primarily an order-processing service, not a marketing service, so our email functions are primarily related to order fulfillment and product-update notification.
If we supported more promotional-/marketing-related email functions in-house, that would tend to increase the spam score of all emails we send (including notification and thank-you emails), which would only impede our ability to meet the email-related demands inherent to our primary, order-related services (such as the download links we provide in our thank-you emails).
Other email marketing services like Aweber already "do it all" and do it much better than we ever could, so rather than reinvent their particular wheel, we simply provide a means to integrate our service with theirs -- see the Aweber section near the bottom of this help page:
Following those instructions will submit every new buyer's name and email to Aweber as if the buyer had manually filled out an Aweber email-list subscription form; Aweber will still send them a confirmation asking if they wish to opt-in to receiving that newsletter subscription.
BTW, if you initiate a Refund on somebody's payment, their removal from our buyers list should be automatic; if you need to remove the email of a buyer who has not been granted a refund, please contact us to request their address be removed manually: