I always figured those programs just would lead to people not on the green plans buying less green energy. Though I guess if you got enough of a critical mass o

I always figured those programs just would lead to people not on the green plans buying less green energy. Though I guess if you got enough of a critical mass of users on the plan it could have that upward pressure. I wonder if any studies have been done? It seems that green energy is often used as much as it can, as solar/wind/geo all have low marginal costs once built, and gas/coal/oil are the ones manually turned on/off based on total demand. That would lead me to believe buying green power would have no effect, but this is all conjecture.