The Superstations where Locol UPN and WB (later CW) stations in three of the relevant time zones that were made available to satellite subscribers who did not have UPN WB/CW local into locals before the must carry rule went into effect, and all the content on those Superstations were exempt from copyrights in regards to exclusivity in each Media Market.
WTBS was neither a UPN nor WB/CW affiliate, but it also enjoyed the same exemption from copyright in regards to exclusivity per Media Markt of the content it aired. Once must carry took effect for satellite, the Super stations became of less use or value to most subscribers because in most cases people could watch their local UPN, WB/CW stations. Although for me back before high definition and in those days of single tuner boxes and DVR'S and later two tuner DVRs, I really loved being able to record hours ahead of our local UPN, WB/CW so that our limited number of tuners back in those days were free to record other programming during Prime Time.