DishTV is the 1st DTH right now who is offering discount on Broadcaster bouquets. Currently DishTV is offering discount for Sony & Discovery bouquets which is 50% to 90% varying pack to pack.
This offer is only available for bouquets, not for single a-la-carte channels. If you have already subscribed to a bouquet earlier, then you might not got offer for that bouquet.
This offer is a limited time offer and anytime DishTV can remove this offer. Since there is no confirmation about the removal of the offer from DishTV end. No fix date is there. So you can enjoy them according to your choice. This offer is applicable for both SD & HD bouquets.