For over a decade, start-ups have used reward crowdfunding to raise billions of dollars of early-stage financing. These companies pre-sell products to consumers while the products are still under development, and customers receive the product as a “reward” for their support when development is finished. Now established companies such as P&G, Coca-Cola, and Lego are starting to get in on the game. Only they don’t come for the money, but for crowdfunding’s hidden value: the voice of the customer.