Did you know that Amazon screws over developers on its App Store?
For all of those that post and take the Amazon Free App of the Day, please read this blog post before you hit OMG FREE! DOWNLOADDDDD!
Since learning of this in late 2011, I refuse to download a Free App of the Day through Amazon's store. Amazon does many, many great things, but this startling find led me to boycott their Free Apps for the sake of the hard-working developers out there that make our lives a little easier or more fun.
TL;DR Amazon App Store is evil. Avoid the Free App of the Day!