Anyone have any experience using them by the described method? Can your/all pass benefits be revoked or will the airline charge back the difference even if you don't ask for a refund due to a computer audit? Supposedly there are no restrictions being they are refundable-nonrev but there is the "contract of carriage" clause that may apply to any fare purchased. Also, if I apply for refund wouldn't they just reprice the ticket and charge the difference there also. I don't even know if/where the ethics rule applies. Just reads any conditions can be modified/revoked by the airline at any time. Res/Fares department doesn't seem to know the answer. Thanks for any help.