I have a story about Rocketship X-M. Dad and I had talked about MST3K but he hadn’t watched any. One time he and Mom were visiting me, and I was watching an episode in rerun while they did some other stuff. He came in, listened a minute, enjoyed the jokes, then did a double-take. “Is that Rocketship X-M they’re making fun of?” I confirmed it was. “Oh, good!” he said, and sat down to enjoy the rest of the episode with me.
It turns out that when Rocketship X-M first came out, it had advertising intended to look very much like the contemporary, vastly better Destination Moon. Dad was already in rocketry at the time, as well as being a lifelong sf fan. He wanted to see Destination Moon. He did not want to see Rocketship X-M. But thanks to enthusiasm and not paying enough attention up front, he ended up seeing it anyway. And he still had a grudge against it forty-odd years later, a grudge finally soothed by seeing it mocked by Joel and the robots.