For anyone looking to renew their domains this January 2014 through the registrar GoDaddy you may run into some trouble. Many, if not all, of the coupons that were staples of GoDaddy discounts on all sorts of things, registrations and renewals included, appear to no longer be valid. Several of them apply but do not provide any significant discount. There is a possibility this could be a glitch in their system but if it stands, domain renewal costs through GoDaddy could rise significantly prompting an exit from the popular registrar.
This could also provide other registrars an opportunity to pick up new clients in the event that they can capitalize on renewal discounts that match or exceed what GoDaddy has historically provided.
Among others, the list that was tried can be found below:
If anyone does have valid codes, feel free to share them, I'm sure everyone would be most interested in finding some.