For at least 10 years I have had a contract for "green energy" from my municipal supplier. They, in turn, contract to buy power from solar and wind suppliers to fulfill the consumption of those who are part of that program.

It does indeed work as I describe. And, because the wind and solar providers are among the lowest-cost providers at this point, "black" energy is losing market share quite quickly.

I understand electricity markets quite well and live and work in one of the most dynamic ones in N. America. This is how it works.