You might very well be correct. However, (and I don't love FB) when is the last time someone in real life called you over to look at something on linkedIN?
Professionally, it is dangerous as you can't show coworkers the great job you found. Most of the articles are advertisements or a logo and smiling people holding laptops, and the jobs (as all sites) are just crawled from every other companies site.
I can only assume that if I have to pay to send you a linkedIn mail we're not connected, and if we are connected I would send you and email.
So, the only reason I go on linkedIN, is because it is too hard to write a crawler to parse what I can only imagine is like 10K LOC of JS, and copy paste the source into my crawler to pull the info. Also, for potential investors & enterprise customers
to view these profiles is $80 a month. So the top people who don't want to talk to us get unsolicited inbound emails from us because linkedin sold them out for $80 a month.
That may very well be, but I have never heard anyone say this except on HN