Well a lot of times there are alterior motives for these rumours. When I worked for Safeway in the 80's , the Budweiser vendor would come in and tell me the latest rumours about Corona beer; That the Mexicans who made it , pissed in the beer so we Gringos would drink it and never know the difference.
Now at the time Corona was the yuppie drink you had at upscale bars at the Hilton with a bit of lime or lemon . Everyone drank it to look COOL. Within a few weeks of this rumour starting ,I actually started to hear it being told to me at clubs I would go to for dancing /drinking. Suddenly the Corona sales dropped at the store and their facings went from 4 to 1 . Budweiser sales went up. Funny huh? That one rumour destroyed the Corona business in my area. Whether it was true or not , everyone started to believe it.
Maybe the alterior motive at Sears is to sell as many hd tvs they can and use Dish as the incentive to do so. If they work on commission like the beer vendors , I can see why they started this rumour.