Original Member, Ambassador: External Miles and Points Resources
Join Date: May 1998
Location: Digital Nomad Wandering the Earth - Currently in LIMA, PERU
Posts: 58,607
As someone who pays for domestic F on every flight I would only swap for an economy seat under extremely rare circumstances. This not even being close to one of them. And in those instances I would confirm that I was entitled to (at minimum) a fare difference refund.
I wonder if your reaction would have been different if you had paid cash money for the F seat rather than been upgraded to it?