At least the MoCo is still giving something to the CVO buyer. Ford's Special Vehicle Team (SVT) used to give out certificates of authenticity with their vehicles that listed build date and the number of each unit in the limited run. Suitable for framing.

When I purchased my last 2010 Shelby GT500 and SVT Raptor I got nothing. Almost $100,000 and not even a stinking peace of paper to tell me how special I am.

Cadillac sent me a gift box with some mints, mini- telescope, polishing rag, etc. when I bought my CTS-V. Worth anything? No, but it's nice that they think enough of your business to let you know with something other than the typical thank you letter.
As far as my gold key goes, I actually have one of them displayed in the open case next to my framed Designers print of my Z4 that BMW sent me.
