Probably due to the fact that Disney wants more money than Dish wants to spend which would cause the package price to be higher and/or Disney would want a bunch of other channels bundled in with it increasing Family package enough to make it not worthwhile.
Probably due to the fact that Disney wants more money than Dish wants to spend which would cause the package price to be higher and/or Disney would want a bunch of other channels bundled in with it increasing Family package enough to make it not worthwhile.