Think about it -- G-d Almighty gave the Jews the Torah -- the whole world trembled -- but to the best of my knowledge only one person came to join: Yisro!
It is hard to comprehend --- G-d Almight reveals Himself and gives elaborate instructions of what the world is about and only a few Jews are interested!!!!
So now you have a better appreciation of Na Nach Nachma Nachman MeUman!
Great blessings of Na Nach Nachmu Nachman Meuman!