Originally Posted by
rosenkavalier
do you think AA is now playing married segment games on partner flights? isn't that even encroaching into a partner's area of control over their flights?
AA is free to impose any extra requirements on the members of its program. They are under no obligation to offer, unfettered, the seats made available to it by partners. After all, your "agent" in these transactions is AA, and what they say, goes.
As an alternative, book the seats via BA's Executive Club.