Business model of this site is to generate views, not downloads.
So the sites owners aren't mutch interested in *why* someone looks on a page. This is fine - for the shorthand.
"No, I don't use this site anymore - there is so mutch useless content that I have no chance to find what I'm looking for. Buying is faster and often - just cheaper than 'free'".
At least for the long run quality becomes important. Especially if this business model is successfull. Because others, maybe with a better knowledge about marketing, will try the same model.
There are allready a lot of sites with free content. Not sure if any other site shares earnings with the content creators. But this is only a small step for most of them.