It wouldn't pick up for if you reversed the tracks, but it would provide less grip. I'm guessing there are reasons for current tank tracks being the way they are.

Right? It would pick up excessive amounts of ground and dump it onto the wheels.

Why do these exist? And I mean all those religious book reading applications collectively. Browsing through f-droid it feels like every third beginner's project is a Bible-, Torah- or Koran-reading app.

Regardless of legality I don't think it's advisable.