I tried to ZED fare on Jetblue once. The agent at the ticket counter took my ticket even though it was a full flight. I told him I need that if I don't get on. He would not issue me a standby boarding card without keeping my ticket. I figured I would probably get on so I went to the gate. I figured no harm, no foul. Unfortunately, I didn't get on so I went back to the ticket counter to get my ticket. No one was there so I came back the next morning. I was told the ticket was already in the safe, and they gave me a number to call. I called for two weeks straight each time getting someone telling me to call back later. I finally gave up. My airline charged a $100 lost ticket fee and the ZED fare was only $70. I never did get my money back for a ticket I never used.

All of that being said, I still buy regular tickets on Jetblue if it's convenient and I really need to be somewhere. I will never Zed fare again on them though. I learned my lesson the first time.