Folks, the first sentence of the article is "Viacom’s stock has plunged around 25% so far in August". Dish's stock price has dropped 5% in August (if you look at Dish's stock price over the last year, this is nothing out of the ordinary, i.e. no impending sign of gloom-and-doom).
If the loss of Viacom to Dish was so tragic, you would expect to see Dish's value dropped similarly, but it hasn't. To me, that means that investors aren't concerned about Dish being hurt financially. Yes, a tiny # of customers will leave, but whoop-de-doo. Wall St folks aren't concerned.