The additional savings from the newsletter link is minimal in comparison to the discount through the standard Mousesavers link.
If you also signed up - or sign up - for the Hot Deals! updates, you'll get notified any time any new deal or important news is announced, and that e-mail will contain another link to the super-special discount.
If none of this is acceptable, you need to provide your e-mail address so one of the kind, generous posters who share the newsletter, can. Just leave spaces between your name, the punctuation, and your e-mail server.