The problem gets worse when the clone gets cloned and then they in turn get cloned. I can think of four individual hypnotist's shows who parrot the same script, use the same music and the same skits. The problem is, the show works great for the original hypnotist because it's tailored to that person, but when the second or third or fourth persons does it, it sucks because they don't have the charisma of the original hypnotist to carry it off successfully. One skit the clones love to start out with is the hot/cold room. Now not everyone who does this skit is a clone, but it's a good indication that they might be. It's one of the most over used skits and in my option should be retired.
There's nothing wrong with a person learning from another stage hypnotist, but they should know enough about hypnosis to be able to change the show to fit their own unique personality and stage presence.