And what is on Netflix one day, is missing the next - with little or no explanation. Netflix is less and less a library of movies to watch and more and more of a quasi-pay-per-view channel with a flat pricing. You can watch all you want - of whatever it is they have this month. And whatever it is they have this month is often crap.
Note also that when it comes to books, the selection of physical books is far greater than those offered for download. Rare and out-of-print books, limited editions and small runs, as well as vanity press, are not represented online, and likely never will be. They can be found on Amazon in physical form, often for only a dollar or two. The "latest best seller" on the other hand, often goes for $10-20 or more.