Why don old Windows Mobiles support Owner Exclusive eBook content?
Ultimately, it’s a question of customer experience. To support the security architecture that enables you to read an Owner Exclusive eBook, your device must have a unique hardware identifier. This identifier was simply not available on the first version of the Windows Mobile. Microsoft dedicated an enormous amount of resources toward developing a software fix to overcome this inherent hardware shortcoming, but ultimately we found the technical hurdles made it impossible to develop a solution that provided an acceptable customer experience.