Limited time offer: Now open to all qualified* developers that publish before August 16, 2015!
If you've never published an app to the Amazon Appstore, now is the perfect time to join! Publish your first app to the Amazon Appstore, and we’ll help you drive installs with a $100 promotional credit towards an ad campaign on Advertise Your App. Advertise Your App helps you promote your app to millions of users on Fire tablet wakescreens and mobile placements on the Amazon Mobile Ad Network. Ads are shown to users within the United States, depending on app compatibility.
to sum it up , you would need to open amazon developer account which is free and you also need to use usa credit card holder information .
Now the reason why you should do it. When the new android devices are being introduced no matter how crappy the app you have or made for that device will get some install n will get you money . So dont bother about making amazing app , just get it approved n get 100 bucks