I remember ON-TV a subscription service in the late 70s that required a descrambler, they had current movies and live sports events such as boxing, it ran on KBSC ch.52 in Los Angeles and for a short time on KAIL 53 Fresno. Sounds like STAR-TV was very similar to ON-TV. I don't think it lasted very long, not enough subscribers, cables Pay Per View pretty much replaced it.