I don’t think an email will work. When I bought some CLUB GITMO caps, I had to use his store’s order form.
After you buy from the site and complete the order you send the e-mail to elrushbo@eibnet.com saying you bought it in the “buy-cott”.
The idea is to send an E-mail AFTER you placed the order and the E-mail is sent to Rush’s inbox so his staff can count the metrics of the people actively participating in the Buy-cott.