Shaw has their wide-area wifi thing. Comparatively slow bandwidth but comparatively large capacity, plus it's available all over the place.
Nation-wide carriers charge ridiculous rates for their preciously parsimonious cellular data provisions.
But there are other options in many areas, better options, especially around large cities.
For example, I pay Xplornet $20/month for 60GB of 5Mbps "mobile broadband" data, available (almost) everywhere across my city and adjacent cities. I apparently also get a VoIP phone number and an email address out of this deal (I don't even remember what they are, lol, but they might be useful features if I ever do stuff like Fongo and Hangouts).
I've seen mobile broadband, wireless, and cellular (3G/4G/LTE) options which advertise faster speeds (25Mbps to 100Mbps or more) and larger monthly capacities (up to 100GB or 500GB). For prices cheaper than anything I've ever seen the Big Three/Four offer. The catch is that these services are usually "local" - they lack coverage when you travel too far away - because their main marketing angle is offering "wireless home/work internet".
If you want cheap mobile data (and you don't need it everywhere else in Canada) then find out who and what local data providers are available in your area. Check their websites from time to time, keep an eye out for promos, it's not hard to score a fantastic deal if you're patient and persistent.
https://www.findinternet.ca/en/shop
