Which inventor pioneered the 'razor and blades' pricing model where the main product was sold cheaply but required expensive consumables, creating a revolutionary business strategy still used today?

The world of inventions and discoveries isn't just about creating new products—it's also about innovative ways to sell them! Throughout history, inventors and companies have pioneered pricing strategies that revolutionized how products reach consumers. This trivia question explores a groundbreaking pricing model that transformed an entire industry and changed consumer behavior forever. Test your knowledge about the intersection of technological innovation and business strategy!

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King C. Gillette (safety razor with disposable blades)
Thomas Edison (phonograph with wax cylinders)
George Eastman (Kodak camera with film)
Alexander Graham Bell (telephone with subscription service)