What you are talking about is called "Significantly Viewed" out of market locals. Dish and DirecTV are already allowed to add "significantly viewed" OOM. The problem becomes Syndicated Exclusivity (SyndEx) and different boundaries for OOM. My cable company cannot give me Dayton locals in the Cincinnati area, but the same cable company 3 miles up the road can. Why? Because it's a different county. Even though both counties are inside the Cincinnati area, only one of them has the ability to have the "significantly viewed" Dayton local channels. Out of the entire Cincinnati market, I think only 1/5 of the counties qualify for significantly viewed, not all networks are represented, and depending on the county you could be allowed a channel or two from Dayton, Columbus, Lexington, Charleston/Huntington, and Louisville. But the vast majority of the viewers in this market would not be able to see the imported channels since they do not qualify for significant;y viewed in the most populous counties in the market. You will find this is the case in most TV markets.
Then there is SyndEx. The owners of exclusive rights to syndicated programming on the imported channel can ask Dish to black it out on the imported feed. The distributors of that programming charged extra to the local channel so they would be the only ones in that market to have that program and have the right to block interlopers.
In other words, it would be useless to have a significantly viewed channel imported into a portion of a market during blackouts since most of the market affected will not be able to get that channel.
