I don't mean this sarcastically but what's wrong with quora? I've always found it to have pretty good content but your comment seems to be implying it's assumed to be a bad place to read things. Why?
Then again, who's going to find that old blog post :P
(I figured out you don't have to pass anything specific into the share parameter, you can do "?share=poop" or even just "?share."
Also, this parameter used to (maybe still does) set a cookie so that you can browse around the rest of your session without worrying about a sign up modal.