Whenever my RSS reader shows me an article from phys.org and the article is open access I decide if I want to post the phys.org article or the paper, this was a toughie. A common situation is that the phys.org headline is "Scientists come to some conclusion" and the title of the paper was "We measured something"; this one was a tough call, I bet it would have gotten <5 upvotes had I posted a link right to the paper.
Sometimes phys.org articles are absolutely great, sometimes they suck, sometimes they run articles off the AP wire or from a university press release. Their advertising is reprehensible, but I've looked at the alternatives and most of them are much worse, it's one reason why phys.org and related sites are on the list of top sites submitted to HN by people other than myself, not just the list of top sites I submit to HN. (I post enough that I really have to take stats ex-myself because for some sites, like coindesk, I post most of them)
Sometimes phys.org articles are absolutely great, sometimes they suck, sometimes they run articles off the AP wire or from a university press release. Their advertising is reprehensible, but I've looked at the alternatives and most of them are much worse, it's one reason why phys.org and related sites are on the list of top sites submitted to HN by people other than myself, not just the list of top sites I submit to HN. (I post enough that I really have to take stats ex-myself because for some sites, like coindesk, I post most of them)