Well I opened the article, near the beginning I saw the text: "81% of recruiters admitted to posting ads for positions that were fake or already filled." Instantly that felt completely insane to me, my bullshit detector went off the chart, so since they provided a source, I followed up on the source to see the evidence for myself. What do you know, the source is from a "my perfect resume" website that apparently cond…
Although I understand, and to some extent share, your skepticism regarding the "study", I have no problem conceiving that a trend might currently be setting around the practice of posting fake ads, for whatever reason. It doesn't require much. In an unregulated playing field, simple peer pressure and survival is all you need to drive everyone to shady practices.
So, the study might be moot, but the number isn't so surprising.