Never used LinkedIn. I used to tutor kids and one parent tried to connect with me on the site. Since I didn’t have an account, LinkedIn sent an email alerting me that someone was trying to connect with me. The amount of emails I got from LinkedIn was insane. Multiple emails every day for weeks. I couldn’t unsubscribe bc I didn’t have an account. Reporting it as spam didn’t help either. I finally had to go into the site, create an account, set all the settings to never contact me, and then promptly deleted the account. Hadn’t received an email from then since.