Nobody gets royalties for published papers.
Correct. Hence "the price is zero".
Author still normally transfers copyright to the publisher. That's what gives the publisher the right to distribute copies and charge for them. By default they do not.
Publications are the coin of the realm in academia.
Correct. Hence "the price is zero".
Author still normally transfers copyright to the publisher. That's what gives the publisher the right to distribute copies and charge for them. By default they do not.