My understanding is that DirecTV and Dish have different rules about what locals they can carry in a given market, restrictions that cable does not have. When I lived in rural Mississippi, for example, the Grenada Cable One system carried NBC from Tupelo, ABC, PBS, FOX and CBS from Greenville-Greenwood, and WLBT from Jackson. And before the digital switchover, they also carried WMC-TV from Memphis instead of WLBT. (For the brief period after the switchover, RF analog cable channel 3 was actually picking up the analog night light service from KTBS in Shreveport, which was kinda cool.)
DirecTV and Dish didn't carry ANY locals in the market at all, and would have been restricted to ONLY those stations in the Greenwood-Greenville-Lake Village, AR market, CBS, PBS and ABC. And maybe the Fox 6.2 subchannel. For some reason, none of the Memphis or Tupelo or Jackson stations qualified as significantly viewed distants for satellite even though cable carried them. (Now that I'm no longer a DirecTV sub, sadly, I can say publicly that the installers in that area always lied to D* so people could get Memphis, Jackson or Columbus locals. I moved my service from B'ham and they never changed my service address, so for my four years in MS I got HD locals from Birmingham!)
I don't know what the situation is now there since WABG put on an NBC affiliate as a lptv station finally.
As for coastal cable systems, I wonder how much reception issues affect what they can carry? I seem to recall WDSU and WWL being easy catches in Biloxi in the analog days with an outdoor antenna, and WKRG was probably easy, too. WKRG is the westernmost commercial full power Mobile-Pensacola station, location-wise, and they also have a massive tall tower that can "see" a lot of Mobile County. WALA's tower is shorter and offset to the east more from Mobile, WEIQ is closest but so short it's too weak to be anything more than a very local signal and the rest broadcast from central Baldwin County and probably don't reach much past Pascagoula. WEIQ and WALA are actually not reliable enough to watch OTA where I live in Foley, which is only about 20 air miles out.