I hope this helps, but when you check out, do not use your existing email address when you check out, it says that the code is invalid as the system has the discounts linked to the email accounts. Thus if you use your husband email it still may not give you the 40% off. I received the 30% off but when i checked out, I checked out with another email account that I had and it took the 40%.
Hope this works for those that couldnt get the 40% to work.