Bcoz still most tv viewers subscribe to Standard Definition chs. HD channels uptake is still low bcoz of pricing. Also OTT space has been growing but that cannot b reason for DTH or Cable operators to prefer adding HD chs, OTT has a completely different set of audience and still that share is quite low compared to TV universe. A younger urban audience maybe fine opting for OTT but a regular TV audience including many people who have OTT subscription they still choose SD chs on their cable or DTH connection.