Man makes millions from catching flies

Mr. Who, skilled in Kung Fu, dedicates his life to fighting flies, becoming a local hero. He teaches his skills and invents the Fly Slayer, a high-tech device to combat flies. His success leads to global expansion, producing 100,000 Fly Slayers annually. Mr. Who's achievements include a collection of 13 million dead flies, showcasing his dedication and success in his unique battle.

How does Mr. Who's approach to catching flies differ from traditional methods?

What are the implications of Mr. Who's production line for the Fly Slayers?