Originally Posted by JDiver

It's most likely going to give you a "special fare" (see the Wikipost at the top of the page) rendering a percentage of the flown miles.

Originally Posted by ashill

It sounds to me like you're confusing the percentage of miles flown with a percentage of dollars spent. If you earn EQDs based on actual dollars spent on airfare, a dollar is an EQD is a dollar (as long as its fare or carrier-imposed fees, not taxes or government-imposed fees). If you're on a special/consolidator fare (where AA doesnt actually know how much you paid), it's a percentage of miles flown, not of dollars spent. Sometimes that percentage of miles flown works out to be more than the dollars spent.