Most of Humsufar trains introduced doesn't have capacity to fill fill 3 AC train in that route. None of them are in high demand routes or prime arrival and departure time and demand days. Those who pay more will look into all these else prefer alternate modes of travel. Indore Lingampalli ajmer rameswaram Tirupati HWH tirupati BBS Ypr arriving on tuesday afternoon at Bangalore and some examples. Even Tirupati Katra require a normal SF then full AC train. Most of HS introduced are first trains in that route which doesn't have normal trains running as daily express trains.