Comment by LightBug1

Or they don't have a job opening at all and are just looking to bolster the database.

I remember the annual cycle back in the day. During quieter times of the year, I'd suddenly get a tonne of calls from various recruiters with a job (no company name) ... almost as if they'd been told, "ok, no one's hiring or placing right now, no point you sitting there on your arse while I pay you. So pick up the phone and get some qualified leads"