Not entirely. There's still plenty of path-dependence in a DRM-free world. For instance, iTunes still dominates digital music despite many things Amazon has tri

Not entirely. There's still plenty of path-dependence in a DRM-free world. For instance, iTunes still dominates digital music despite many things Amazon has tried (exclusive sales, Cloud Player, free credit, ...). Aggressive pricing may still be worth it to entrench Kindle as the default, even if customers can easily leave.