It's true that their general policy is to not allow cash exchanges for Cash Cards, however when the Cash Card is issued as a rebate they are absolutely allowed to cash them out. If you are met with resistance, bring in your trip documents from Costco Travel and show them it was a rebate from cruising. Also ask to see their policy notes showing where it does not allow your request. This info was given to me directly from our local warehouse manager, so unless there is a regional exception stated somewhere in their policy you should be given the payout.