As a Canadian that sells products to the US I can say that we absolutely pay tariffs to the US government in place of our customers who should be paying it, depending on what shipping provider you use. USPS doesn't have the infrastructure or care to collect tariffs, so they won't, meaning the shipper has to just pay them up front and either jack the shipping cost by an arm-and-a-leg or just eat the cost. Canada Post even requires you as the shipper to pay them. If I ship UPS I can have the buyer pay upon delivery. It's 100% bullshit. I'm luckily under CUSMA, but the first month of tariffs when no one knew what was going on I paid out the ass on shipping and never got any refunds for it like Americans supposedly did, I just got fucked. In Canada and most other places it's normal to pay tariffs and duties when you order anything international (upon delivery) and all carriers know how to collect at delivery (or collect ahead of time online), but the US does not and it's alien to them (as seen by many customers screaming bloody murder over a $4 duty fee that anyone else in the world would kill to only have to pay).