Something new for those discussions on which is the best airline to use.
I'm guessing it's bad news for most. Delta has announced that they're changing their frequent flier program to award miles based on spending instead of distance traveled. "Passengers will garner from 5 to 11 miles for each dollar spent on airfares depending on their frequent-flier status"
Those higher rates will, of course, apply only to those who fly most often, and that's not most of us. My recent trip from JFK to OGG totaled just under 10,000 miles. Under the new system, even at 11 miles per dollar we'll be getting fewer miles on any airfare of less than $910 for that trip. Those who only fly a couple of times a year for vacations will presumably be getting 5 to 7 miles, making them losers on airfares of less than $1425, or even as much as $2000. Since itineraries that are 50% shorter usually aren't 50% cheaper it may be even worse for those making shorter trips.
OTOH, if you fly frequently and have to pony up for expensive fares you may be able to acquire more miles under this method. If you pay for first class it should also increase your miles unless you get a really great price.
Jet Blue and Southwest already use this model, but Delta is the first major carrier to announce the change.
On the positive side, if you earn miles from a credit card or other affiliate programs I presume the awards will remain the same and be based strictly on how much you spend.