User Payment, Not Feedback, Defines Product-Market Fit
Friends' opinions, while well-intentioned, are often biased by social pressure, providing an unreliable measure of a product's true value.
He argues that concrete evidence, such as a credit card transaction, provides an objective assessment of whether a product addresses a genuine need. This payment signifies a user's perceived value, indicating a strong fit between the product and market demand.
Lee's approach prioritizes tangible user commitment over anecdotal praise, establishing a clear metric for startup success.


