Recruiters are always willing to waste your time especially since their job is to provide their employers options, and besides they need their pay as well. If they aren't recruiting, then they aren't justifying their own salaries. So while you might be getting interview or connection requests, that doesn't correlate to actual hiring.
He's referring to third-party recruiters, who could use your resume (or information about who you've recently applied with, which they'll usually ask) to find potential clients. Doesn't make a lot of sense if we're talking Google or Amazon recruiters.
