[boredumb]

Since it was based on ounces sold, my initial thought was it would balance incentives of watering down the actual formula over time.

[DL-Invariant]

You're smart to think of how it could be gamified.

However, the product is tightly regulated and has stiff competition. The brand name is a huge driver of sales. Anything that could impair the brand image, like dilution of product, would cause more long-term value destruction.