Question: what's the value to you of moving from unrestricted Y to unrestricted C -- figuring for business travel and not vacation travel. For example, if I would pay $2000 for an unrestricted round trip between Portland and Tokyo, then to me it's worth about another $1500 or so to be in C. Beyond that it's worth only about another $500 to $750 to be in F. This has nothing to do with how the airline prices the ticket (except for the base Y fare) but represents what I would pay for the added service and increased space.
For comparison, when I last took this run, full Y RT was $2000, C RT was $5000, and F RT was about $7000.
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"If you want to win the game, write the rules."