Try it yourself:
(I never realized that till someone pointed it out. I always wondered why they had the ugly hyphen.)
> Open any Quora URL. If you come across a Quora link anywhere and you want to read it without being asked to join Quora, you can add the text "?share=1" to the end of the URL. Example: http://www.quora.com/Hostage-Situations/What-does-it-feel-li...
There was a time when I thought it was a better Q&A site, but they continuously make it worse and worse with workarounds like this for the simple act of viewing a page entirely.
> What I don't understand is why Quora was/is loved by people like the Facebook team ... The fact that they require you to log in __via a social account__
Quora "furthers" facebook by requiring a facebook account, so naturally the facebook team will "love" it. It furthers their (facebook's) business interests.
My real gripe, is why would google index with a quite high ranking something that's not public?
How do they get away with gaming Google search results like this? Why is Google complicit in this shady practice? I don't want walled gardens appearing in search results.