Firstly you do not get to buy spot power prices as anything short of an industrial user in NZ. I used to administer one of the systems for submitting bids, so unless you're a milk factory or aluminium smelter, you're buying at retail.
You don't live in New Zealand any more, do you, MonkeyCee.Perhaps you did, ten years ago, five years ago, maybe even three years ago, when it was true, only big boys could buy electricity on spot. Then came smart meters, new and innovative retailers, and now anyone in a smart meter area can buy on spot because spot is a choice offered by at least one retailer.
Welcome to the brave new world.
The whole point of this thread is that apparently smart meters are a waste of money, and only benefit The Man. Well, in at least one country with smart meters, that is out and out bullshit. Or more accurately, it may benefit The Man, but it benefits consumers as well, offering them choices that prior to smart metering simply weren't on the table.