I recently submitted a link to a PDF paper. It first appeared as I submitted it, but after some time the title had been changed to include a Scribd link. I found this off-putting: it implied either that I was encouraging the use of Scribd, or that the author had already chosen to use Scribd as a publisher.
What is the relationship between Hacker News and Scribd? Are all PDF links modified to link to Scribd automatically, or is this done by hand on a case-by-case basis? And why is the use of Scribd officially encouraged, while primary non-framed links are preferable for HTML content?