Homer thought that the company was using his likeness without his permission until a video from Mr. Sparkle's parent company explains it came from combining the logos of the companies who produced Mr. Sparkle as a joint-venture: a cartoon fish (representing Matsumura Fishworks) and a lightbulb (representing Tamaribuchi Heavy Manufacturing Concern), proving the resemblance was sheer coincidence. The whole thing is summed by what Bart tells his dad, "There's your answer, fishbulb."