Originally Posted by Adam B.
I suspect this has more to the with it's usage for iPod/iPhone books, and getting them at deep discounts over Mobipocket prices, and then using them on any Mobipocket enabled device.
They didn't care about the script until the iPod app came out. At the same time, they started to remove the serial number from the "My Kindle" page. I don't think this is a coincidence.
I think that is the reason also and the reason only kindlepid is mentioned.