What I was trying to say about spam is that your karma doesn't count so much as being a participant in the community counts. Like, I post a lot of articles to web sites that aren't my blog so if I post a few links to my blog it is OK. Now I'm an extreme case because I post a lot of links, but somebody who has like 1/10,000 the karma I have or less could post what they like so long as they aren't posting all links to the same web site. That's the place where your participation matters -- my posts don't do any better than anyone else's.