Here's the "Welcome to Topps" code from November 17, 2014, for anyone who wants to try it. I'm pretty sure it was this same code in every one of those emails, which most people on here would've received, I would think.
BYWD96674KFJS324N
It worked for me yesterday, but another member I sent it to just told me it didn't work for him. Still, might be worth a shot. Try not logging into Topps when ordering and instead make your payment with Paypal, and that might do the trick.
Good luck!