robbed,
The Dorks don't eat fuel, it's just that if you put too much fuel on the plane, you have to lighten the passenger load or remove bags, and nobody wants to do that. With a full passenger and bag load, you can fuel the Dork for less than 2 hrs of flight with a reserve, so that leaves few turns where it would be worth fueling through. PSA dispatch very seldom fuels through a station. They prefer to fuel at each station both to maximize useful load, but also to save money by not carrying around unneeded fuel on the first leg. Unless there's a huge extra cost savings involved, it's not worth tankering fuel on an aircraft the size of a Dork. Maybe with shorter legs, and therefore less fuel to carry for the return leg, the Dashes save enough time on the turns (or outrageous outstation fuel costs) by not refueling to make it worth it. They might also have more of a useful load with fuller tanks, so they may not gross out as easily by tankering fuel.