Please me know know.
~snip Removed link to Unauthorized Giveaway snip~
Best answer by nic
So it looks like this is an old keycode that we had previously disabled, for the HSBC deal (due to it being abused by other places online). Somehow it got re-enabled again, so we're going to get it permanently disabled so that it won't work from here on out. Thanks for letting us know about it!