Actually Quora is better than that (for me) in that it's a double hit on the hype on both Q&A and social.
These kinds of moves:
- requiring login to view content;
- partially obscuring content on Google results to maximize sign-ins; and
- showing what you view to other people.
come across to me as a company coming off hype and approaching a crunch point. I believe now, more than ever, than Quora will end up an acquisition for Google or Facebook or will simply slide into irrelevance.
[1]: http://www.bothsidesofthetable.com/2010/08/23/the-power-of-q...