I think cable providers pay to carry the network for all their subscribers but have the freedom to carry it where they want. Another article mentioned that Cox had the rights for all its subscribers but opted not to carry the networks on various cable networks outside the PAC12 region. Angering, among others, Las Vegas residents, most of which wanted at least the local California networks, but are only getting the National.
Perhaps enough people demanded the channel in Cincinnati for TWC to carry them.
Real sports fans in Las Vegas likely have directv and directv has CSN CA and CSN BA feeds. + Diamondbacks with sports pack.
And the sports books all have directv. Now this is why directv needs all the feeds.