In a having to pay public domain regime, works that have entered the public domain after their copyright has expired, or traditional knowledge and traditional cultural expressions that have never been subject matter to copyright, are still subject to royalties payable for the state or to an authors' association. https://thedirectoryblog.com/listings13382546/how-the-complete-cthulhu-mythos-tales-can-save-you-time-stress-and-money