Unless I misunderstand you, you're citing a completely irrelevant factoid. Employment statistics are based on actual people working, not job ads posted. And the revisions [1] (which sometimes are upward) have nothing to do with ghost jobs, but are due to additional data coming in over time, leading to refinements of the original estimate[2].

[1] https://www.bls.gov/web/empsit/cesnaicsrev.htm [2] https://thedispatch.com/article/jobs-report-revisions-explai...