What is the primary mechanism of profitability for simple, mass-market consumer goods such as the zipper?
Answer
High-volume licensing or direct unit sales
Simple goods, like the zipper, rely on high-volume unit sales rather than controlling an entire industry. Because the item serves a clear, practical function and is inexpensive to produce, the inventor profits by licensing the design to various manufacturers or selling millions of units directly. The scale of the profit is derived from the sheer volume of products sold across a global population over several decades.

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