Originally Posted by taming
Unlike Amazon's Kindle. folks using other devices actually can have copies of the book on their computer in ways that the seller cannot control. For example, I can download an ePUB of a book that I have purchased from Kobo that cannot be retrieved by Kobo. They could delete the kepub version, but not the ePUBs.
With Amazon, users can
keep a copy as well, I just don't think that users would do this. If you don't go out of our way to keep a copy, the book will be gone from all your devices as soon as they are connected to the internet again. I guess sellers just need to trust their customers if they want to offer returns.