Originally Posted by
bworrell
AM chat has worked for AM+ upgrades and seat assignments on AM-operated flights. ... If you're talking about upgrades on DL-operated flights then that will take the diamond line to see if there's a way to help you.
I'll try the Twitter team from in-air tomorrow and see if they can get anything done, then the line, and report back.
It's often AM-coded when involving intra-mexico flights. Additionally, you get a big MQD (and regular miles) bonus going AM-coded usually.
I haven't seen 200% or 150% MQM for AM metal upgrades for a while, alas.