The $100/month charge for the SEO Blackhat Forums is well worth it if you are either into getting ill gotten gains or into combating those gains. Every time I log in there I find out more interesting things that spammers and blackhat types are doing to make money. There’s a thread on there discussing splog hubs. For those of you who aren’t aware of what this is, let me enlighten you (picture ripped from said splogger):
On the right you have your unique content blogs, like mine or the dozens of other ones that you probably visit, with no malicious or spam content on them. In the middle is a spam hub. On that hub, the spammers pull all the content and aggregate it into a centralized hub. They use IP filtering so that the servers on the left can access it but no one else can. That way if for some reason the splogger visits his own spam hub, and sends a referrer (through an image by inadvertently clicking a link) the owner of the site cannot see their own content on the hub.
In this way they sploggers are scraping their own sites. This is so that when the owner of the site sees their content on the splogs on the right, even if they manage to take them down, they haven’t ruined the infrastructure that is used to scrape their content. Interesting. I have my own fun ways to combat this sort of things (along the lines of how I ruined the another splogger’s day. However, this is an interesting take (a splog by proxy) that I hadn’t heard of before in this way.