Originally Posted by
manually
I was able to twitter to delta and get seat assignments in c+ for the domestic leg of my international trip. I used my AMEX for KLM 20K MR points.
If you don't like the answer, wait a bit and try again.
I had taken advantage of a similar AMEX promotion (with AirFrance) and booked on Delta metal but AF codeshare. I couldn't get C+ so ended up paying the difference for D1.