> Kindle books can be loaned to another reader for a period of 14 days. The borrower does not need to own a Kindle -- Kindle books can also be read using our free Kindle reading applications for PC, Mac, iPad, iPhone, BlackBerry, and Android devices. Not all books are lendable -- it is up to the publisher or rights holder to determine which titles are eligible for lending. The lender will not be able to read the book during the loan period. Books can only be loaned once, and subscription content is not currently available for lending
* Customer purchase a licence to download and play a game, linked to an account
* Licences can be given or traded with other account holders (subject to a reasonable time-limit)
* Machine has to phone home in order to complete trade.
That would be a completely fair system for all parties involved. But publishers don't want a system that is completely fair for all parties involved.