I seriously question whether LinkedIn is more effective for corporate networking or for providing attack vectors for social engineering.
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LinkedIn has been by far the most effective place for me to job hunt for about a decade.
It's also been useful to keep in touch with people I use as job references but otherwise have no relationship with. (Less important as corporations rely less on references.)
It probably has led some scammers in my direction, but nothing that's been an issue (to my knowledge).