Originally Posted by
ethernal
Duh, this. I forgot about RUCs. Person 2 and 3 (and, presumably 1) have obviously applied RUCs on lower fare class tickets. This thread can be ignored...

Originally Posted by
Lyaec350
This is actually an interesting observation and one which could be used to determine the relative rate of upgrade certificates on a given route.
I agree, although it seems obvious in hindsight it hadn't really occurred to me either

so I found it to be a useful thread anyway