There's nothing wrong with that but I do think it would be a much harder market opportunity to exploit. You are definitely in a minority. Also, just a nitpick but if you don't click ads you are not a product since Amazon doesn't buy products who merely view its ads.
Apple's profits have very little to do with sales of its operating system. As I said, it would be nice to see "Ubuntu machines" but unlike Apple, Canonical would never enjoy a monopoly over Ubuntu hardware due to Ubuntu's open source nature.
