Never fear, as Amazon’s working on it and indeed is planning on allowing in-app purchases. With the “Amazon Appstore for Android In-App Purchasing Beta Request Form,” developers can sign up for the in-app purchasing beta SDK. It’s invite-only, for now, and you have to answer a few questions, including:
Name and e-mail (natch), plus a company name.
Whether you’re a current member of the Amazon Appstore Developer Program. And if so, how many apps you’ve submitted.
Whether you’ve used Google Checkout, PayPal, iOS or some other form of in-app billing.
The current number of apps you have that include in-app billing.
The kinds of in-app content you currently offer.
What kinds of apps you develop.
What kinds of devices you offer. (Interestingly, there are three choices — handsets, tablets and Kindle Fire. That shows how Amazon’s treating its product, no?)