Where does it say you are entitled to rewards on any particular post?

:) The answer is: probably nowhere in this exact term, as far as I can tell.
But it's the suggestion which is out there, big time. As I said, you can say "it's nowhere said, so why would anyone assume it?" And my answer is "because, in various and colorful ways, its the underlaying message". Would you really say that this is not the case?