Originally Posted by thezipper
Plat upgrades on award tix come out of A inventory... and on a DCA-DTW or MSP flight those are zero'd out weeks in advance.
True. And this
might explain why Alpha Golf wasn't upgraded.
However, in my case I know for a fact that multiple "A" seats existed several days in advance and I still got skipped. EUA enters a remark in your PNR if the process is unsuccessful due to seats not being available. No such remark appeared in my PNR
and Golds had definitely been upgraded ahead of me.