I would probably have a LinkedIn account, but for their super annoying viral tactics. Many of my professors and co-workers have sent me LinkedIn invites, without their knowledge. LinkedIn may no longer be doing this, only because it's harder now, but in the past, their app would scrape your contacts and then blast all of them with a LinkedIn invite. They're not the only company that does/did this, but it's a detestable tactic.

https://discussions.apple.com/thread/252914656