Where did you see that Dish pulled down the AAD HD distants? I believe Dish is providing them because AAD was not selling enough subscriptions to the HD distants to pay for the sat space,and just ended that service. And Dish has accomplished three things;
1. They are not fully competing with AAD, because they are not providing distants to dwellings.
2. By not providing to dwellings, it skips the whole qualifying process, where they got into trouble before.
3. By not knocking out AAD, at least those in white zones can still get distants, just not HD.
They may make some money, but I think the number of subscriptions will more cover the cost rather than make any real money. It is entirely possible at some future date they will expand the service, but it won't really matter to most because most won't qualify like they do with AAD.