Probably the cheapest and best option is to build more wind and not care too much if it increases curtailment.
Yes, all the things mentioned should be looked into and done when it makes financial sense but "wasting wind" is much less a thing to worry about than "burning gas", and I'd rather waste wind than waste money.
However, there is none of that. Just that the IAB does not want to make it easier for users to escape their tracking (which, given their purpose, is unfortunately entirely expected). What justifies "But it hates users tracking them."?
Then when you receive spam/unsolicited marketing emails, you can see to which email the spam was sent, and therefore which company sold your data.
This suggests the only way to keep this behaviour is to have your own email hosted and use a truly different email per service.