My Venture X fee posted on 11/25, and my $300 credit reset a day or two later. I booked a $298 Main Cabin flight with Delta, with plans to cancel for an eCredit. When I tried to cancel, the Delta website gave me an error. Delta support chat said they could cancel it for me, but there would be a $50 external partner fee.

Thankfully, I was able to change my flight to a same-price flight on another day, without a fee (since it was Main Cabin). I was then able to cancel the flight for a full $298 eCredit.

If my travel credit posts in time (45 days after the last date on the statement where my fee was mention, apparently), then I will probably cancel my card for a refund. I also have a CSR and Amex Plat, and would rather get the double dip bonus on the travel credit and move on. I'm doubtful the 10k anniversary bonus points will post in time, but that will be a nice bonus if so!