What are you talking about?
https://news.ycombinator.com/item?id=39562986
https://news.ycombinator.com/item?id=39562984
In my last search I used Hacker News for about 90% of my applications. It worked a lot better because I usually directly interacted with hiring managers.
Sadly, there aren't any other reasonable options with regards to job searches and candidate advertising than LinkedIn.