Anecdotal, but last time I was job hunting I had a significantly higher call back rate when applying through the companys listing for the job on their website instead of places like indeed or LinkedIn. Idk if it's true but I read that job boards will scrape listings from each other/company websites and make an easy apply that goes nowhere to create the illusion that more places use their service. So you could easy apply to 10 jobs and maybe actually only apply to like 6 real ones.

That said I ended up getting a job from a staffing company that cold called me about a job I'd applied for and then got ghosted by the interviewer for previously.