After Trai implementation this business runs on numbers,more numbers of subscribers more Rs153 NCF,margin per subscriber will be coming down to less than Rs200 for DishTV and Rs230 for Airtel,so Airtel sees future reduction of profits drastically and at that time Jio will be launched and many will start disconnecting DTH connections as they will be happy with single cable Jio broadband connection giving them broadband, TV channels with android option and a landline.
Airtel has lot of loan due to mobile business,so this is the right time to sell DTH and take more to reduce debts.If this happens Tata sky will also comes under stress in coming days and they also will have no option but to sell to another DTH operator or merge another DTH company to servive