I personally tend to avoid PDF files or, if a HTML version is available, I will go to that. I just don't like the format and avoid it. Sure my browser renders it fine but I avoid.
Similarly, with Scribd, I avoid. Others do to, and, in time, people will learn not to bother with Scribd. They will avoid it from both ends - uploading content and viewing content.
I believe you can just upload a PDF to a GDrive share and set it to be world viewable. Or you can restrict it. It all ties in to one's Google account, so why would you want to go to Scribd for that? Imaginably people will come to that conclusion and, before too long, Scribd will become even more irrelevant than they are now.