. Me too - I truly dislike unsolicited approaches.
I accept LinkedIn contacts by referral and make new introductions by referral only. I ask someone in my Network to introduce me to those people I've identified (such as those people who 'touched' a post) - i.e my employee actually sends the prepared message to the Contact.
Same with new clients - only by referral, and
I choose whether a new relationship will be a good fit.
I'm not a stockbroker, and it isn't a typical financial service.
LinkedIn is for research and communicating with my Network - people who know me and look for my posts; my comments were to explain that success on social media requires more than a secretary posting a photo now and then.