Originally Posted by
redvelvetmartinis
I have NEVER, EVER gotten miles for an upgraded Y ticket.
Did they start this recently, or has it always been the case?
I used to do upgrades about 3-4 years ago, but stopped.
If they've always done it... that's A LOT of retroactive mileage I am entitled to (but will probably never be able to claim).

Upgraded tickets should accrue mileage in the original booking class, but not in the class upgraded to.