Unfortunately, we are not allowing mystery or random codes. The only way you can list these is, if you disclose what kind of code will be delivered (Avatar prop), Microsoft points, XBox Live subscriptions, etc. The random/ mystery part is which one, which prop, how many points or how long a subscription. I hope this clears up any confusion. Thanks for your cooperation.
I am leaving this one up so you can make the necessary changes for this to complete.