Steam IS a monopoly.
Steam isn't a monopoly. They have a massive dominant position, but it doesn't qualify them as a monopoly under US law at this time. In short, they have to be found to be abusing their market dominance. This lawsuit could potentially change that, however.
If people wanted it wouldn’t they be buying it of their own volition? Maybe you're interested is some uniquely Canadian cultural art, but most Canadians don't seem to care,
I think what you might be overlooking, at least from the point of why they would require it, is that there are just a lot less people in Canada. Their population is around 15% that of the USA. Even if a large portion of their population was interested, it would be harder to drive the numbers needed.
$50/year support fee per device would be completely unreasonable.
I think they were saying a reasonable minimum required cloud support period should be 2 years per $100 of the device's cost.
Computer programs expand so as to fill the core available.