Also does purchasing Big Front Seat qualify for the credit? Technically it's not an upgrade per se, but you're selecting seats.
Also what's up with the FR trigger due to flying with NK? I did it number of times and nothing happened. I pay for products and services based on my need (ain't paying premium for the mediocre services from the Big 3), if AmEx wants FR I'll just close my accounts. Let's see if there's any DP regarding this.