Checked in for our flight today from DFW to LHR and was offered an upgrade from economy to premium economy for a cost of $0.00. Both of us are Executive Platinum and flying on a very cheap fare through AA Vacations. Does not look like our mileage upgrades will clear since business class is full but we never give up hope until the doors are closed and we take off. Really miss the good old days of receiving 8 SWUs; have had to fly coach or use mileage upgrades.