I thought Quora was a Stackoverflow clone. I never really understood wtf is the point of Quora. I go the main page and it wants me to sign up. Really? No, I'm

I thought Quora was a Stackoverflow clone. I never really understood wtf is the point of Quora. I go the main page and it wants me to sign up. Really? No, I'm not gonna sign up just because you say you're awesome. How about you prove to me that you're awesome by showing me the real homepage that registered users see, huh?