I can understand Amazon/Comixology's position on this but it takes serious chutzpah to announce that in the same blogpost as:

http://comixology.tumblr.com/post/83931330905/important-chan...

"We’ve made changes to our Google Play Android Comics App so please, update to version 3.6. In this new version we have a new comiXology in-app purchase system and a great new cart feature, one of our most requested features."