[rcorin]

Thanks! Indeed we suspect it's likely like you say---Kindle people aren't app purchasers, but we'd love to see some real evidence. We also offer ad-based free apps, btw, and our category isn't reading & books, it's photography apps.

[bdfh42]

And there are masses of "how to" photography books - it would be great if Amazon promoted you apps to everyone who purchased a book on that topic - but do they?