Originally Posted by afv011
The Google Play Store does the same, but seems to manage it better. I don't know if it is a one off on Google when you install the app or if it is a periodic check like Amazon, but there is some behind the scenes validation going on for paid apps on the Play Store as well.
Not just a bad internet connection?
I guess you can hand out APK files to people, maybe they are checking for that?
When you've paid and know you're legit it becomes a nuisance, kind of like flying domestic in the US.