I just noticed that the free minimac website is putting an emphasis that they can only accept one account per household. So my wife (and anyone that wants to help me) needs to use the referral code http://minimacs.freepay.com/?r=14217121.
I should point out that you have to sign-up for 1 service which is significantly less than the cost of a minimac. The service that I am going to use is the printer ink. Since we all need to periodically buy printer ink it only makes sense to me to use that as the promotion to qualify for the minimac.