[Maktab]

When it comes to apps, Apple is the publisher. They make all the rules and can do as they like.

For music and books Apple has to negotiate contracts with publishers who likely demand certain conditions in return for their content being made available on the various iTunes stores.

Considering Apple's consumer-friendly position on the repeated downloading of apps, it seems reasonable to guess that forcing consumers to pay to redownload books, music and videos is a requirement imposed on them by the content publishers.

[jasonlotito]

I've long suggested that iTunes isn't a media manager as much as it is DRM Software.