Though, from the error, I think you tried to sign up without the coupon - make sure to use http://www.thisemailwillselfdestruct.com/signup/free-promo-534b10dd8

Though, from the error, I think you tried to sign up without the coupon - make sure to use http://www.thisemailwillselfdestruct.com/signup/free-promo-534b10dd8 http://www.thisemailwillselfdestruct.com/signup/free-promo-5... so you don't have to pay ;)