eg. "if you're looking for Scalability architecture solutions currently in use, start here."
Think about it - the people contributing here have some of the most valuable grey matter in the world. They are coming up with tomorrow's technology. Obviously not all of them want to share that, but many share their knowledge and experiences in hindsight.
The solutions that HNers implement today filter down into the common practices employed by the masses tomorrow.
Why bother trying to extract the tiny bit of lasting value when there are sites like Quora and Wikipedia that specialize in it?