From Marco Arment’s post Stop Not Linking (which links to Stop Not Linking by Matthew Panzarino):
But the bigger problem is the practice of news sites rewriting articles from source sites while adding little to no original value. In those cases, where they put the source link doesn’t matter, because as I wrote a few months ago, they replace the need to view the source article.
I try to link as clearly as possible to the source material and this is the reason why (along with everything else in those two articles). Seemingly the larger the publication, the worse it is.