Originally Posted by Fly AA J all the way

That makes a lot of sense, except for one thing: the use of "A" inventory for both types of fares. If what they care about is not selling discounted yet flexible F seats, why not use a different letter for the upgrade code like they do for J seats. They have J, D, I, C, and R for busienss class, whereas they only have F, A, P, and X for first class. If they replaced one type of A class with another letter (though I'm not sure if any letters aren't taken, lol) then problem solved.