You're not wrong, they do only operate in Canada, but I was mostly referring to "why would a company buy the .CA for a million dollars if they already own the .COM", and the importance of .CAs to companies in general.
In the examples above, I doubt they paid a million for any of the domains mentioned but since they ultimately chose to go with the .CA over the .COM (when they had the choice) it seems clear the .CA was more important to them and therefore I think it's possible they were willing to pay the same amount (or more) for the .CA than the .COM. It obviously depends on the seller too, as most of us Canadians don't hold out for a million dollars.
In any event, I agree it's tough to get top dollar for .CA domains and would love to see members here (or anyone) blaze the trail and make it a semi-common occurrence. Perhaps wishful thinking, but the world is changing quick, so who knows.