Originally Posted by
cxfan1960
Seat guarantee always works on J, C (on CX not KA), but never works on D, I. In fact, I feel that award availability (at least upgrade award) is higher than I availability. I think that is because CX makes more money on booking classes YB than DI.
Fair points....although if you have a little patience, I had success clearing the waitlist for I fare as DM

. Not sure if that applies for the OP or not, as I only found out I cleared a few days before departure