I'm a little stunned at what looks like a naked attempt to fleece the rubes. Everything I've read indicates that the understanding of it is essentially theoretical. Direct evidence of it operating or how it operates is not to be had, so far.

My guess is the profiteering class has figured out that the public has heard the phrase "dark energy" and don't know much about it, which oddly is much like the scientific world: "don't know much about it."

It strikes me that it's something in the realm of gravity. A powerful force in its own way, but not something you can harness and put in a gas tank.

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1986 300SDL, 362K
1984 300D, 138K