Or international arbitrage. Lots of stuff sold cheaper in USA than other places. Even stuff like a big bottle of ibuprofen or allergy pills are much more expensive in Canada.

While arbitraging deodorant sounds silly, I have bought EU roll-on deodorants online before because they're not much of a thing in North America. And they don't melt into a mess in a hot car.

Deodorants are hardly a thing in SE Asia, partly because of biology/genetic differences: https://www.nytimes.com/2018/02/02/business/china-consumers-...

There can also be customs arbitrage as small packages from little sellers can slip through.

Usually because you avoid tax legitimate business pay (import tarrifs, vat)

Tax evasion may be profitable, so is shoplifting.