I just received my code - almost exactly 1 month after I entered my details on the
http://www.htc.com/us/htc-accessories-offer/ page, which is what it said to expect.
The problem I have is that the original web page still states in the terms-and-conditions:
6. Coupon code must be used within 30 days of issue. Codes entered after expiration will have zero value.
But the E-mail I got with my code - the E-mail was sent Sep 15, and says my code expires Sep 22. And of course nothing I would want is in stock. At first I thought that was fine, since I knew the code was good for 30 days, but then I checked the mail and saw it was only valid for 7 days.
I just used the Contact Us link to enter a complaint - I will have to see if they will extend it to the 30 days they promised in the Terms and Conditions.