"The more items Amazon sells to Prime members, the more money it loses." What bookshops have been saying for a decade is that Amazon is selling books at a loss, which used to be illegal as anti-competitive monopoly activity.
Much better than the opaque NYT article linked is this December article from IBT: "Amazon: Nearly 20 Years In Business And It Still Doesn't Make Money, But Investors Don't Seem To Care" http://www.ibtimes.com/amazon-... It has the quote above, and the historic profit/loss graph I was looking for. Revenues have risen at a 45 degree angle, but profit/loss hovers around zero.