I feel viacom18 should have continued regularly promoting Colors Cineplex Bollywood and Colors Cineplex Superhits across their portfolio of channels as well as rival channels so that more people would have gotten to know about these channels and demanded it frequently from Tata Play or other operators where it was/is missing. They stopped promos of these chs just few weeks after launch.
Coming to And Xplor HD there were minimal promotions done for it and above all these promos mostly were restricted to HD channels of Zee. Maybe they aired some promos of And Xplor HD on their SD channels but i had not seen it. Also And Xplor HD was not promoted on any rival network channels.
Broadcasters need to distribute and promote channels properly, latter becomes even more important if channel has not managed to launch on all major cable or dth platforms