Hell, why do this many people use LinkedIn? The whole platform was built off of scraping Windows user’s address books without permission, sending unsolicited emails to all of those contacts using the name of that user, and pretending like they were such a great platform that of course your friends are inviting you to also join. And I’m pretty sure they still use this practice today because I continue to get emails from people who have no idea why their name is being attached to the spam I receive.