Dish Network dropped a net 12,000 pay-TV customers in the fourth quarter of 2015, as the skinnied-down Sling TV over-the-top service failed to offset losses in the company’s core satellite business. The satcaster ended 2015 with 13.897 million pay-TV subscribers (including Sling TV), a year-over-year decline of 81,000. In 2014, Dish lost about 79,000 net TV subscribers.