This is a quandary for me. I try to keep my LinkedIn network literally to people I know and have worked with or with whose work I am familiar. From what I can see, you seem like an excellent person to know, I’m flattered that you enjoy my posts on that list, and I appreciate your providing that context since so many invitations I get have robogreetings on them.
I couldn’t bring myself to click the “I don’t know Jack…” button, but since I take LinkedIn literally (I want to be able to recommend people from my own direct experience) I also don’t feel right accepting your invitation.
I hope you understand.