Why do we now have commericals on cable television?

Back when cable television first came into being, the cable companies advertised, “join our cable company, we are commercial-free”. now, i am paying for cable and i am forced to watch commercials and infomercials and i hate it. i can change channels, but thats not the point. are cable companies double-dipping? receiving money from subscribers and money from the commercials, also? what happened? was this just the old bait and switch by the cable companies to entice more customers in the beginning?