Biasing the quantum vacuum to control macroscopic probability distributions

First, I love your attitude towards life and this comment elicited satisfying chuckles from my soul.

That aside, perhaps you could explain to me what's "new" and/or "better" about a quantum RNG?

Were all the sources of "true randomness" we used in the past not, at their core, relying on some sort of quantum phenomena (even if "we" didn't know it at the time).

I'm NOT an EE but I've seen all sorts of circuits (that I don't deeply understand) that rely on some side effect of a transistor or diode to produce entropy. Transistor noise, random telegraph noise, thermal noise, etc.

Using the Universe Splitter is more fun: https://cheapuniverses.com/

I think the idea is that even in a vacuum there are inherent fluctuations in electromagnetic field. They're adding fluctuations that are comparable to the background but slightly different; to maintain conservation of energy the vacuum fluctuations have to shift in response (I think? I'm not an expert in this area).

I guess one way of thinking about it is that at the quantum level there's no true vacuum in a classical sense.

There are, and impossible because you asked for "cheap".