Good News Kids! The Commissary at Great Lakes finally codes as a straight up 6% cashback grocery store. I like to think that it was my vigilance and constant bickering with AmEx customer service that got it re-categorized. Most likely it was coincidental with whomever runs the show there. You are welcome if that is the case of the former being true.
Another good thing to report is 5x is real for airline tickets and fees related on airlines charged to AmEx Platinum. I charged this on the day it was announced and I got the 5x points today. No evidence if charges made on MPX count for this bonus yet. More to come.