I think what strikes me as the large-scale problem here is that some people are baffled by the concept that not wanting money might be a rational decision. As a completely different example of the same decision being rational, let's remember when Tarsnap wasn't accepting Canadian customers (despite a presumably sizable potential market) because dealing with Canadian sales tax law was too much overhead. Even if the pa…
FWIW, Canadians are about 2% of Tarsnap's customer base by revenue. This is a bit less than proportional by population, but not much; the USA is about 40% of Tarsnap's revenue, but that includes several large startups (like Stripe) and Canada is distinctly lacking in similar.
The extra 2% is probably worth doing the sales tax paperwork for... but only barely.