Originally Posted by
CaptRobPhD
X simply indicates how many seats/reservations may be made in a fare 'bucket', only an indirect indication of the actual number of seats available. Ideally you're hoping as an upgrade to see 9s
I'm sure you are already aware of this, but for the sake of any new AA flyers who come across this thread I'll point out that the maximum availability shown for AA is 7, not 9.