In fact the LinkedIn invite seems to work as the "universal caption" for every New Yorker comic ever:

http://time.com/4046328/new-yorker-linkedin-caption/

So it's clearly the pinnacle of human civilization. It makes perfect sense that it's the message an alien intelligence would want to send us too.

That's a great modern twist on the original idea that every New Yorker cartoon works then the text is changed to, "Christ, what an asshole."

wow, great minds...I guess.