Okay, the Amazon is preparing for their own android apps store. What you see up there is the welcome package they sent to developers. It is not up and running yet as they are still building the tools necessary for the apps store but they are close. Right now what they are doing is to stock up on promotional materials and other non-app assets for the grand launch. And Amazon said that it is up to the developer whether or not to enable the Digital Right Management And like Apple's, offensive apps is not allowed.
Although it's not ready but it is very close and it is sending invitations. Would this apps store really is a challenge (threat) to the android market?