Because, for reasons known to the engineers toiling at Google, and not me, these sites will show in the search results, and the actual StackOverflow answer will not be shown at all.
That would be the fastest way in my book. I've never worked out why SO allows it in the first place. Is it just to appear open and web 2.0-y, or is there a business reason. It's a proper business now, users are loyal, cancel the licence. I can't think of a single person who would say 'oh, but I much preferred to read those spam sites'.
As someone who has contributed a fair amount of content to SO, I would wholeheartedly support modifying the CC license on the content I've contributed. I much prefer the idea of that to the idea of allowing my answers to help build dens 'o spam like eFreedom.
Now that I think of it, my answers going straight-to-spam is a nontrivial detriment to my contributing content to SO.
But I really posted this comment in reply to say thanks for the blog posts on jquery/asp.net. They really got me going in the right direction - fantastic stuff.
1) Is it possible to require the question title as anchor text in the creative commons link that points to the question (and not a nofollow link obviously)?
2) Make a widget for embedding a question and chosen answer on a web page, along with a link back to the question, a la google maps.
3) Make a wordpress plugin that takes a stack overflow link and turns it into the question and chosen answer, with a link back to stack overflow.
The specific example at http://webmasters.stackexchange.com/questions/5385/page-appe... is ranking SO at #1 for me now, but if you send some more examples I'm happy to chat with people in the search quality team about this.