Each code can only be used one time. If you find a code, and it no longer works, it's no longer valid. We just haven't been able to remove the code from the site just yet,
Enter all found Easter egg codes into the Gift Code section (NOT Discount Code) at checkout. These codes will not work as discount/coupon codes.
Codes will expire at midnight on 4/30/2015.
UPDATE! There are still a few big guys lurking in out of the way places, but since we've nearly hit our quota, we've started adding more $10 and $15 codes on the site. Enjoy!