Posted November 20, 2014
Yep, apparently those codes have expired. Check this thread for GOG code expiration dates:
duk3nuk3m: I'm fairly sure the Carmageddon Max Pack promo codes that were handed out on Reddit last year would have expired by now. I think they only lasted until the end of October this year iirc. Correct me if I'm wrong. If I am, chances are slim that they'd be valid for much longer anyway.