Only one subscription pop-up form can be submitted at a time.
When submitted, a new DB row is created in the table mailing_recipients
Since 9p we will do all subscriptions update
from the PHP subscription view file form without ajax -
Each subscribe button is actually a PHP view file that
will post back to it's own page.
Each button when loaded will pick up any previous post data
and do the subscription DB update.
Button view file
submits back to it's own containing page.
Post data can be checked as each form is loaded.
ajax-subscriptions.php DEPRECATED too