The title Amazon App Store: Rotten To The Core should give you an indication of how well it went for an Android app development shop whose app was put up as the 'Free App of the Day' on the Amazon android app store.
To add insult to injury Pocket Casts relies on a server to parse podcast feeds (allowing instant updates on your phone), and all these new users forced us to buy more hardware just to meet demand. Hardware that we are going to have to support indefinitely at our own cost.
Great for users, really bad for devs. Hope there's a better way to do it.