So we're not accused of throwing around unfounded accusations here on FR, let's get some facts. Harlan Ellison ("A Boy and His Dog" and the story that Terminator is based on) said that Hubbard told John Campbell (editor of Astounding), "I'm going to invent a religion that's going to make me a fortune. I'm tired of writing for a penny a word." Sam Moskowitz (sci-fi historian) backs this up.
Years before Terminator, "A Boy and His Dog" was made into a low budget film starring Don Johnson and a cute little pup that looks a lot like Benji.