Originally Posted by
MSPeconomist
Nothing has changed. Full Y is always at the top of the upgrade list. The difference is that if upgrade space isn't available at the DM window but later becomes available, those who buy full Y at less than T-6 get the upgrades versus DMs on lower fare classes.
What I experienced during a dummy booking was full Y upgrade space available, but no upgrade space available on a K fare, logged in and within the GM window.
The upgrade cleared after I booked (later that evening between T-4 days after 5pm ET and before T-72), so it might have been that the sweep of the system had not finished for GMs while I was looking with the Y fare.