Because in PM areas, the only option customers have to get their packages before 4:30 is FO, they have no option. if you are a business in a PM area, and need something actually "overnight" and not by the end of the day, FO is the only option, so that is where the "volume" is coming from. Not that its a bad thing, but the only reason you are seeing volume is because FedEx is opening more areas to FO, and its a mostly good thing.. cept FedEx is fleecing these PM customers for the same $$ someone in a AM area gets.