I was recently unable to find a particular journal article I wanted to read that was referenced in something else I was reading. I only could find an abstract on Google Scholar, and nothing at all on Z-lib. I was able to get a full copy by just emailing the author at her university (I guess its true that most of them will give you a PDF if you ask. they are just glad SOMEONE is actually reading their work). But now that I have it, I fell obligated to share it with the world, the question is, where is the best place to put it?
I think that very much depends on what sort of article/chapter, what publisher, and what the nature of the copy the author has is (e.g. preprint, journal published version download, unpublished Word manuscript, etc.) It’s hard to make any true generalisations here.