Currently agreed workflow:

1. Registered users have ticked "Subscribe Newsletter" checkbox by default.
   1. Users who registered via e-mail (form) then has newsletter checkbox on reg page and can untick it. Users who registered via social provider or signed in via existing rh.com account then newsletter checkbox is ticked by default.
2. User can unsubscribe via "Subscribe Newsletter" checkbox on account page
3. Once we would need a list of subscribed users for sending first newsletter we just run sql query which returns e-mails from users who has ticked the "Subscribe Newsletter" checkbox.