[Symbiote]

Alexa also lists amazon.ca, google.ca, canada.ca, kijiji.ca, realtor.ca, (ebay.ca), walmart.ca, cbc.ca, bestbuy.ca, airbnb.ca, homedepot.ca, and several *.gc.ca sites.

In my experience, outside the USA many ccTLDs are commonly used – including the "domain hack" ones, in their own country.

[smnrchrds]

It helps that .ca domains are not available for all. As an individual, you need to be a Canadian citizen or permanent resident to purchase one. For companies, they need to have presence in Canada.

[SamBam]

Yeah, seriously. Spend any time in Europe. Most local websites are at their ccTLD.