[The CSR said] that there is always a limit to the number of times you can download a given book. Sometimes, he said, it’s five or six times but at other times it may only be once or twice. And, here’s the kicker folks, once you reach the cap you need to repurchase the book if you want to download it again.
Amazon Kindle Books Can Only Be Downloaded A Limited Number Of Times, And No You Cannot Find Out That Limit Before You Hit It
By June 22, 2009