Hmm, I’m Canadian who’s currently living in the states. I can think of a bunch in Canada that offer free shipping off by memory: Amazon, Indigo/Chapters, EB Games, Footlocker, Walmart, etc.
The anecdote you mentioned would also apply in the States. Duty paid for purchases from abroad, like Taiwan. Also, much like Canada, you’d usually pay shipping for small mom-and-pop shop or boutique web stores too.