It varies by province.
Ontario has a fairly mature program—called the ICI, or the industrial conservation initiative—that rewards demand responsiveness during peak times.
In my home province of Alberta, we're currently reforming our electricity rate structure, and that's certainly something we're advocating for in the form of demand charges.
It really does vary province by province. In many Crown provinces, the electricity rates traditionally have been a lot simpler, for the sake of their electricity systems being simpler, in the form of regulation.
There's definitely work to do, but there is a good example here in Ontario.