As Artie Johnson used to say, "Ver-r-r-ry Interestin-n-ng," Andy. A good thrower that can do other things, while still functioning as a thrower, would be worth something. I have learned from past experience (pre-Busse experience, of course) that one does not throw one's "good" knives. And throwers are only to throw; they don't cut wood, open letters, slice meat, shave kindling, etc. As I understand it, you are proposing to change those rules.
If you produce a thrower that is useful in other ways, it certainly should sell a few copies. If I bought one, I'd still have to be careful not to throw it past a tree and out into the dense brush, but then one should always select target and backstop with some care.
Lane
Remember Rule Four