smm_admin

You can't download an appx file from the Windows store, you need to contact the developers. See the original post in this thread. Here's some info on creating / signing your own Line Of Business apps. Sideload Windows Store Apps - Windows 8, Try, Test, Help | TechNet

As Sted said, they are per user but also with a limitation of up to 5 different devices for that user. Windows 8.1 raises this limitation to 81. If you even manage to locate / download the .appx files you want to include (directly from the publisher), you can import with a powershell command. DISM App Package (.appx or .appxbundle) Servicing Command-Line Options

This seems to be the only option right now although you would have to think this would be violating a few MS Term & Conditions...

That's a fantastic idea. Unfortunately at this time I have none to add so I will be keen to see what people come up with.