Not to mention that it's a free product. If it was trying to do something underhanded (eg. actually spy on users) then I could understand, but actually it's just Canonical trying to make some revenue by facilitating the sale of Amazon products. As an Ubuntu user, I want them to be successful as a business, it's a convenient feature, and I could easily turn it off (or not use Ubuntu) if I felt strongly against it. I can't understand why people pour so much energy into being critical of an underdog when there are so many other options.