I read the article; it says nothing about income tax. It talks about corporate tax, which gets into the reasonably debatable issue of "if you serve from country X and users are in country Y..." If you have no legal nexus in a country, it's a lot more reasonable to pay no tax in that country.

If you have employees in a country, then you necessarily will pay income tax in that country.

(Also, https://news.ycombinator.com/newsguidelines.html .)