The scraped ones are the bad ones. Bad formatting and categorisation, not kept up to date (the job might be expired on the original site but still displayed on LinkedIn) and you have to register and apply on an external site.
It’s quite ironic that LinkedIn is so against scraping despite doing it themselves.
Last time I was looking I used those sites to fil the quota for job applications per day that receiving JSA (social security) requires in the UK - whilst putting the real effort in to the 2-3 decent possibilities a week I found.
The worst part though, to me, is that it seems too often to completely ignore my search terms in favor of showing me "sponsored" or jobs that match my profile, even if they completely lack anything from my search.
It's a shame, because it has a few features I really like that I dont see in other job boards. The ability to filter by both the company industry and the job function is pretty nice.
Also, I can't stand the interface for looking for a job. I really wish it had a "Jobs since you last looked", because otherwise I just kept seeing the same jobs I wasn't interested in.
Any post by a company with no logo is virtually guaranteed to be spam. I'm seeing them side-by-side with the real post. It's highly polluted by these bad actors.