The marginal electricity cost is zero.
replyOr specifically, electricity was already paid for with the pre-paid capacity.
replyNot using it would not save them any money, they already paid for it.
The first is a physical quantity that can be written down.
replyThe second is approximately no better than astrology.
The second point is, sadly, true of quite a lot of aspects of software, including "design" and "quality"
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