The thing about horoscopes is that they are so vague that they are bound, by the law of averages, to apply to some people to some extent.
One newspaper reporter who had been detailed off to do the horoscopes got bored with it and resurrected the horoscopes published decades previously, jumbled them up and published them under random signs. He got just as many delighted customers as before.
A lecturer made up a single horoscope and gave it to every student saying that it was a personal reading based on his or her date of birth. At least half the class said how accurate the horoscope was. All just silly nonsense.