The phrase "too cheap to meter" is often mentioned alongside energy proposals that involve some more efficient way of generating energy (like nuclear fission or fusion).
It strikes me as highly unlikely that we'll ever be in such a position. Wouldn't people simply use way more energy if it were so cheap, balancing the efficiency gains with new use cases that haven't yet been invented?
The only other mention I've seen for a "too cheap to meter" situation that makes sense is for internet data. Internet providers give their customers unlimited internet data, and charge a flat monthly rate.
But internet data is hard to monetize directly, whereas energy is easy... which makes me think energy will never be "too cheap to meter".