Originally Posted by JohnAx
If there were no D seats when the booking was attempted the passenger has the choice of picking a different day or a lower class, with no expectation of compensation. Why does this change after a reservation has been made?
I would guess that many xONEx reservations are made well in advance while there may be plenty of D. Also, days of travel may vary from originally planned due to the nonavailability for D on a certain day.
There is also the issue of auxillary components to a trip such as paid transfers, accomodation etc.. These are generally made once the flights are booked and it is not always that simple to just rebook the flights to other times.