It's still in the App Store:
https://itunes.apple.com/us/app/scoop/id1050308420?mt=12
I also found it by searching for "Scoop" in the Mac App Store app. Let me know if you see it
When I click on your link and then on "View in Mac App Store" it says it's not available in the Austrian App Store. Same with the German App Store. Also by searching directly in both of them, it's not listed.
I purchased it with my Austrian ID. The German one is only for a few purchases before I moved to Austria, which are not available anymore, like Mavericks and iPhoto for example.
It's in my purchases list and when I move the cursor on the app name, it is not getting underlined like every other app, what leads me to a link for it.
The download is working and the app too.
It's version 1.1.0, what is the current version and was also the current version when I purchased it.
I just wonder if I get future updates when it is not in my country's store anymore.
And why is it gone there?