Additional Data Point
Just as an additional data point, I've noticed on the manifest and on the boarding scanner that it has a * next to my name.
I have not noticed any difference in treatment, but I've not had any upset schedules or delays either (which I like to think is part of the proper planning process for your trips).
If I were to request special treatment for this, I would request that they actually remember to put the requested lemon in the cranapple juice, but I'm easy to please......
As for spend, about 35K per yer, all domestic (IAH - East Coast & IAH - West Coast) usually all on Y-Ups, B-Ups and the occasional M-Ups (can you believe that you can snag a confirmed first IAH-SFO r/t for $517 all-in a week in advance.....).