[mmahemoff]

While I also whine about Stack's broken moderation, I still contribute because its heart's in the right place as a site that genuinely wants to help people learn and get answers. The problems you mention are more like implementation details that are subject to ongoing experimentation and can't be changed overnight.

The good thing about Stack is anything I write there will be as easily accessed as if I'd posted it on my own blog, not re-purposed as SEO-bait and blurred or hidden until the user signs up. Furthermore, it's licensed under Creative Commons instead of serving as a donation to the site owner.

Quora is actually a great site once you're logged-in and I find a lot of the content fascinating, but I also wonder why people continue to contribute to such a closed system.