The Witcher 2 codes have been sent to Closed Beta players who:
- signed up to GWENT newsletter (not GOG.com) and didn't unsubscribe from it;
- agreed to their personal data being processed for marketing purposes by CD Projekt S.A.;
- played GWENT on account with the same email address as the one used during the process of registration to Closed Beta.
If you meet those requirements, please make sure to also check your Spam folder.
If you didn't receive an email with a code for The Witcher 2 then it seems that you didn't meet the above requirements. I'm afraid that no bonus codes will be sent.