The 92WICKEDWED10 code still worked after the 14th. And still works right now (9:13 pm 15/12/22 WST) - I just bought Studio Series Core Rumble with the 10% off ($17.98) online. Rumble has been released now along with Core DOTM Laserbeak, Legacy Core Soundwave and GI Joe Bumblebee ($93.60 with the code) as JB uses Eastern time, which is now the 16th of Dec.

I don't know how long the code will still work.