"To be exact, it was easier for them to get a “box” from a managed hosting provider with an NFS or iSCSI mount then it is to take the additional effort in configuring and managed EC2 images and the Elastic Block Store (EBS). They “would have had to build our own infrastructure management system” in order to get Amazon Web Services to do exactly what they wanted."
Blog Joyent | The “Cloud” is supposed to be better than the “Real”