Close to zero? Tell that to the people that paid to build and maintain the infrastructure necessary to distribute all those Kindle books. A team of people to ma

Close to zero? Tell that to the people that paid to build and maintain the infrastructure necessary to distribute all those Kindle books. A team of people to maintain an online storefront, the manpower required to scan all those books, servers, bandwidth, a wireless deal to distribute those books, etc... It could be less than shipping dead trees all over the place, but it's nowhere near zero.