I met a very interesting guy in a zoom networking session and wanted to pursue what he does, how I can use his services, and refer him to others, but first I wanted to get to know him, and then connect if warranted.
So it should be no surprise that I looked him up on LinkedIn. And I was given the choice to connect to him (not ready for that yet), or message him. I had a couple of ideas to put forth to entice his attention and foment conversation, so I chose the message option, and then the surprise–I was given the option to send him an InMail! For a definition of an InMail, see its definition in the Help Center (of course).
That was curious and so was I. I am not a premium subscriber but he is.
The fact that I could InMail him shows me he has opted to receive InMails from those he does not know, premium or proletariat member.
How did this prole discover “why” I could InMail him? As you might expect, I looked it up in the Help Center! See https://www.linkedin.com/help/linkedin/answer/139. Now I know. And you do too.
This is what it looks like on my screen as I compose the InMail, with a few hints on my part of words to say to e-introduce yourself.

I will await the contact and look forward to the collaboration.
I am an optimist and as proven above, socially forward in my connectivity, when it seems meant to be. Are you?
Marc W. Halpert
LinkedIn personal coach, group trainer, marketing strategist and overall evangelist, having a great time pursuing my passion of connecting professionals so they can collaborate better!