It all depends. I have a funny feeling that part of Dish's selection process for locals is a combination of which major markets have pissed-off cable customers and how few channels Dish can get away with carrying.
I like to pick on Cincinnati and San Diego, partially because of TNG Tony. In Cincinnati, according to TNGTony, the station has offered to pay for the equipment in order to carry the local UPN affiliate on Dish. But, because they are technically a low-power station, Dish refuses to carry it, even though DirecTV and the local Cable company carry the station.
Same thing with San Diego. There are a lot more stations than Dish carries. But, because the transmitter equipment is located in Mexico, they have a call letter beginning with X, and thus do not qualify for must carry.
Now, look at the markets being added. is a sub-100 DMA, yet it is being carried. The local spot-beam map indicates that it will only cover a small portion of Nevada including Reno and Carson City. Yet, how many stations does Reno have? Only the majors. I actually drove by one of the Reno stations several times, and it's a TINY place. But, if all you are doing is rebroadcasting network and syndicated programming, and don't have a local newscast, you don't need a big place.