SPAM ALERT: Just received an email promoting some company which I'll avoid mentioning which I haven't subscribed to. I marked as spam on my email system, I've clicked on the unsubscribe button and just in case I've tagged it at spamcop. Do you know what it said at the automated unsubscribe message? "You've been unsubscribed from (person's name)'s Linkedin Contacts List".
Get this: when I accept your LinkedIn connection, I'm allowing you to reach out with relevant information... BY LINKEDIN! I'm not giving my permission to spam me on my personal email using a automated tool. Do the work first and make me subscribe in the first place.
Everyone choose to use shortcuts. Often, end badly.