So as a Silver, I have to pay...no thanks, not worth it and my client won't reimburse for it.

Now I have a trip already booked for 6/30-7/7. I've got 5B (E75) outbound and 10D (M88) return. They are now showing as Economy comfort but my seat assignments are unchanged. Do you think I'll be able to keep those seats for free, or will the system automatically move me?

What happens if I pay the fee but then get upgraded?