To be very honest, when an author downs their work all over the Internet, we tend to think that should be respected, and we don’t like links even to things like the Wayback Machine. Some authors have had to take down all their fan fiction when publishing original fiction, due to the requirements of their publisher. Sometimes, they’ve taken down their work for privacy concerns. So, we would rather be cautious, and not post those links.
If the author posted the work on another fiction archive, we do allow those links in the search threads, or on the Great Wall Of… thread. We don’t allow links to those sites in the archive itself, however.