If you completely understand it, then why so much angst over it? Just because a plane ticket is expensive, doesn't mean it's a upper fare that qualifies for the promotion. You obviously assumed expensive=qualified.

I just took a S class international fare for over $1000 on Continental. And later this summer, I'll take a full Y on CO for about half that price. A few weeks later, I'll take a B on NW for $250.

In the end, study the promotion, and make sure you understand it before you act on it. I'll admit that some promotions can be very confusing, but if you have questions, ask on here, or call up the airline directly, don't wait for 6 months when it's too late to do anything, to finally ask the important questions.