Very interesting.
I certainly have "gotten" what I thought was a ghost job. I went through the whole process ... they "wanted" to hire me. But didn't actually have a start date / couldn't actually hire me. For everyone involved though they seemed to be able to justify posting the job, interviews, because IMO, it made THEM look busy / effective.
The whole hiring people industrial complex seems oriented to be focused on the process of hiring (high fives for ever more complex hiring processes / delays) ... and not at all on the outcome (did we hire someone, were they good?).
It's the ultimate system where simply doing anything is "success" / and more processes rewarded, and there's almost no good measureless about outcomes for the company.