I really really resent this new system by air NZ (Yes I know it's not "new", but rather the newest). I have real issue with the lack of clarity around the process, about the true likelyhood of the success and the potential extra costs. At least when it was a set amount, I could make an informed decision.
We used to fly exclusively AirNZ and enjoyed BC travel due to the volume of our CC spend and the amount of travel. Now we just fly Air NZ if it's the "best" option and this seems increasingly less and less often. Our few interaction with the "new" management have been very unsatisfactory, they are not the company they were under Fyfe.