Just a thought on the idea about the "mass of users that would contribute little": why do people assume others will never grow, change or that they have a certain fixed "intellectual level" based on one source of articles they chose to read at one point in time?
As far coding horror links go: the main point of posting a link here is to discuss it, and I, personally, would much rather read comments about Atwood's posts here than on his site because I consider the signal to noise ratio in comments here more reasonable. Even if articles from any given source don't get facts right or if they sound like blatant self-promotion with a programmer facade, I feel the insight from the community's comments are still invaluable.