Didn't do a running calculation to see if it was worth it?
Nope. I didnt get to use it as much as I was hoping but having it over here was a game changer:
I recently booked a flight on chase portal using UR
MCO-BOS-TLV on LY/B6
On the return I had a 13 hour stop in BOS. Having a go wild pass and 50K frontier status I booked a F9 flight shortening my stop to approximately 4 hours.
Because of the bad weather in BOS B6 issued a fee waiver for my flight.
I first changed my ticket with JetBlue to a later flight that day and later I chatted with them and they refunded me $150 to TB no problem. Apparently once they made a change to the ticket it turned it into a B6 owned ticket which allowed them to refund it.
I was quite shocked but very happy that I managed to get anything from JetBlue especially since it was booked through Chase on a LY ticket.