> They're thin in some places but huge in others. AWS, for example, has a 50% gross profit margin, and their gross margins on digital goods (mp3s, ebooks) are a

> They're thin in some places but huge in others. AWS, for example, has a 50% gross profit margin, and their gross margins on digital goods (mp3s, ebooks) are also high. How do you know this? I don't think they have ever released this information in their financial reports. Are you going by analysts' estimates?