A movie is like real estate... You make it and you can keep "renting" or selling it. Movies like 'Gone with the Wind, Casablanca, Snow White" are still making studios mad money on different delivery systems from the original theater showing on through to VHS, DVD, Blu Ray, 4000-pixels and streaming.'
These movies came out in the 1930s. They are almost 100-years old.
NetFlix got that fact pretty quickly when the studios wanted to renegotiate contracts and that is where the bulk of their money is coming from. [They are] the creator and the distributor.