Aside from the fact that they were able to be received at the head end, I could never figure out why they carried WCYB and WJHL in Beckley. There is absolutely no connection between Beckley and the Tri-Cities, and they wouldn't be anyplace that people from Beckley would ever go shopping, for medical care, and so on.
At least Roanoke is a larger city, and 3/8/13 would have been considered the "big city" stations, relatively speaking, along with WCHS being in the state capital and WSAZ being the best-known and most professional news operation in WV at the time.
It was possibly because, as I said, the stations could be received in the first place, and to provide variety in syndicated programming and reruns that was a big drawing card for out-of-market stations on cable in the first place.