Yeah, and to be clear, I'm not pissed off or but hurt at you, because I stole the joke (at least the text portion, it wasn't a meme that I saw originally) from a post that I saw on linkedin, so the repost phenomenon is much more likely to happen with an "old joke".
I agree, too, how some memes catch and some don't. It may have to do with time of day that the get featured, etc. Meme on!