Amazon is using language like "e-book(s) sold" when the reality is that they mean "e-book license(s) sold." The difference may be subtle, but if an e-book comes with DRM, the buyer certainly does not "own" it. Amazon even makes that point themselves, as they promote e-books as having "no secondary market."

This is an important point when you consider the vendor lock-in of the Kindle "ecosystem." Instead of "e-book," a better phrase might be "Kindle software."

Amazon should be careful of throwing stones about illegal collusion as they approach market domination. It will be very easy for them to make a mistake which runs afoul of anti-trust law.