I get the implication, and while that wasn't the point I was making, the purchase of a self-contained app from the app store is
essentially the same thing as owning the app.
You've exchanged money for a good, and as the app owner there aren't any readily available means of getting the good back from the owner should you disapprove of how they're using it, just like it would be with a tangible good. Obviously copyright still stays in effect so their ability to copy, resell, yadda yadda are still restricted, but otherwise it's theirs.
That said, in this day and age, fewer and fewer apps are completely self-contained, and/or work without being plugged in to something, so it's effectively a moot point.