Both with the built in system version and the upgraded version, when I download say, the free app of the day, it automatically installs it. Previously, It would purchase it, then download it, then once it's downloaded, I got a permissions page where I could then cancel the install.
I frequently "purchase" the free app of the day to get it on my account, but then don't install it.
Is this change something different with the way GS3 works or did Amazon appstore change something. I think it's the GS3 because it happens on both version 9 pre-installed and version 10 updated.