What could be the reason for the store to claim "The app is not available for purchase" to a random user? No pending updates, visible in the store, has previous buyers. The user reporting this has a supported device with up-to-date firmware.
What could be the reason for the store to claim "The app is not available for purchase" to a random user? No pending updates, visible in the store, has previous buyers. The user reporting this has a supported device with up-to-date firmware.
Where is the user located?
See Monetization
Only users from the following countries can purchase monetized apps:
I suspect this is the exact reason. Thanks for pointing it out!