Which of these inventions was first successfully commercialized using a subscription-based business model in the early 1900s?

Throughout history, inventors and entrepreneurs have developed various business models to monetize their discoveries. One particularly innovative approach was the subscription model, which transformed how certain inventions reached consumers. This poll tests your knowledge about a pioneering subscription model that changed an entire industry and influenced modern subscription services we use today. Can you identify which revolutionary invention was first successfully marketed through a subscription-based model?

This is a live public trivia poll on AIPolls.Net. Vote and see real-time results.

Gillette safety razors (razors given away, customers subscribed to blade replacements)
Edison phonographs (devices leased, customers subscribed to cylinder recordings)
Singer sewing machines (machines provided, customers subscribed to pattern books)
Bell telephones (devices installed free, customers paid monthly service fees)