Brother, this is the simplest thing to decode after gathering knowledge and experience about policies + functioning of dth companies all thru these years .
Tata Sky will call subscribers, give them attractive offers and lure them to activate LDP or Retention Offer by recharging with said amount. Once Tariff Order comes into effect, they will tell the subscriber that TRAI has mandated to discontinue old plans and migrate all subscribers to new regime. Post this they will calculate daily deduction amount for active pack and reverse in customer account, now all this big amount will have to be consumed by subscriber whichever way suits him/her the best.
Basically Tata Sky knows that only way to earn max revenue from now on is to make sure subscriber stays with them for longest period and shells out more, this gameplan is a way to achieve this target