Originally Posted by
JonNYC
Because they'd like as many of them as possible to go unused-- especially on the kind of flights that brokers/buyers are willing to pay people for their miles for.
thats what i figured; and i realize that it's not only AA; i'm sure most (if not all) FF programs dont allow selling. but i strongly believe that when you buy something it's yours and you should be free to do with it as you wish (within reason)