Just a thought about the nature of economics...

Free energy ?
There is no such thing.

Unless you're talking about your home fireplace, and the trees in your back yard, you are paying for the source ( oil, wind, sunlight, gas, etc ) or the means oh delivery ( wires, pipes, solar panels, windmills, etc ), but either way, you are paying.

Sci-fi authors and scammers have already monetized the concept. Casimir Energy just cashed in, bilking some venture capitalists out of several million dollars.

But there’s no actual product to monetize