I think Adam's mistake here is to go too much by the numbers. He presumably has numbers that show that Quora ends up net ahead if they force people to create accounts to read answers. He grew Facebook very effectively by following the numbers. But he may not realize how different this case is from Facebook's. It may well be that for a site like Quora, at this stage in its life, users are not all equal. It may be a mi…
I became so enraged over this that I decided to install the "Personal Blocklist (by Google)" Chrome plugin and then added quora.com to the blocklist just so that I wouldn't see them in results when I searched for things on Google.
Like you, they've trained me to never want to contribute to their site, and to never, ever want to consume the content they provide.