Amazon is burying up the Underground Android app marketplace
At the same time, Android users will continue to have access to the Amazon Underground app to shop for physical goods, access Prime Video content, and will – of course – be able to use any previously installed Underground Actually Free apps.
Everything that has a beginning, has an end
However, there won't be much incentive for continued use of the UAF. As of May 31st, 2017, Amazon will no longer accept new app and game submissions for it, which means a dearth of new content and slow death for the platform.However, Underground developers will keep getting paid for the time users spend in their apps. They will also be able to submit and publish updates to existing Amazon Underground apps until 2019. So not all is lost, gone, and eternally forgotten.
Things that are NOT allowed: