when that site first got going, back in my 20s, it had the most aggressive recruitment strategy. it was walled off from non users and prompted new users to add all their contacts as a way to automatically connect them with each other "professionally". it would then spam email addresses not associated with a user account asking "Do you know [Name of Person]?", prompting/pressuring you to make an account and do the same to all your contacts.
just wave after wave of emails until I created some spam block rule for the entire site out of frustration.
it took seems like a decade for the network effect to really seize people, when some old fart would ask me why I wasn't on linked in. "Never saw the need" I'd say, "I'm trying to be on less social media sites, not more" maybe if they seemed like they'd understand.
I resolved in those first days I would never join such an aggressive site that flooded the shit out of my inbox "on behalf" of unsuspecting users. I didn't want to be part of the problem.
seeing what it has become as it's user ballooned into "Facebook for sociopaths" has been as disgusting as it is unsurprising.
I've changed jobs 4 times from age 30 to mid 40s and never used it. barring some true curveball between now and my last days, I expect I will be able to have cultivated an entire complex, professional career involving various credentials, professional associations, formal education/training, and technical skills networks without ever having a linkedin account.
and it feels fucking fantastic. fuck that scumsite.