Originally Posted by mtparadis
So do you want them to call you up and upcharge you every time the fare on your flights increases?
No, do you??
Virtually all other parts of the travel industry let you take advantage of lower prices when they come up - and they don't charge fees for this. I do remember at least one time when someone tried to send me a bill for more compensation after a deal was already consumated, but I did not pay him.