I've been doing quite a bit of research and I'm wondering, which cards offer a travel credit that includes "seat upgrade" charges? I know of the Ritz Carlton card (which is no longer accepting applications), and the CSR (because you can essentially use the $300 travel credit for anything.) I have the City National Bank Crystal card and the Amex Platinum. I've already used my CNB travel credit on GCs so I can't test it this year, but I may try it next year just to experiment.
Anyway, have I overlooked any other cards that offer that specific use for the travel credit?