Long time ago, my curiosity leaded me to watch Gene Simmons' reality show about his family. I was pretty shocked to learn his kids are extremely normal. And he used to be a schoolteacher at the elementary school before he became famous. He speaks five languages. Gene is extremely workaholic and greedy because he knew his KISS band would not last forever. It compelled him to start his business by investing and patenting merchandise like KISS clothing, hats, etc. I have a feeling he would back off from patenting ILY if he had learned the truth. I'd be shocked if he won't budge, then he is a jerk.
Many successful bands would never last long. For instance, Vanilla Ice (Rob Van Winkle) made a smart investment by flipping mansions in Florida.