[dghlsakjg]

Airline tickets are done for identity at some level (although even that is dubious since until recently you could fly without any id at all), but at another level they charge exorbitant fees to change the name on the ticket or even to just cancel the itinerary.

[mr_toad]

Seems to be partly price discrimination, I guess that people willing to pay more will fork out for flexible tickets. Same goes for seat allocation.