To answer your last question - they persist because they can make money. I understand that recruiters who work directly for the hiring manager/firm provide val

To answer your last question - they persist because they can make money. I understand that recruiters who work directly for the hiring manager/firm provide value by filtering candidates. Unfortunately, jobs often get posted to multiple job sites by multiple secondary recruiters, exacerbating the need for filtering. Candidates can waste time dealing with multiple recruiters for what they think are different positions, only to learn that they are the same spot. The industry could streamline this problem - and make the experience better for candidates - by eliminating paid referrals from secondary recruiters.