Dunno about Apple, but goog sometimes pays out bugs that are "theoretical" in the way you describe. That is, you show that there's a bug somewhere, but you can'

Dunno about Apple, but goog sometimes pays out bugs that are "theoretical" in the way you describe. That is, you show that there's a bug somewhere, but you can't "reach" it from user data. They'll pay less than a PoC, obviously, but will pay. YMMV, etc.