Originally Posted by
grapefarmer
Thank you for the helpful information. I didn't know and am surprised that if you take one upgrade they won't offer you another. Seems to be a loss on their part, but I will still keep watching and check at the gate too since there's so many D1's available. I appreciate it, and now I've learned for the future!
Delta protects the “exclusively” for the D1 cabin and would rather give to a non-rev than a paid gate upgrade—maintains the high margins. Unlike AF/KLM who will offer responsible paid upgrades at the gate.