There are a few techniques on BHW focusing on link building spread over different ip's such as this http://www.blackhatworld.com/blackhat-seo/black-hat-seo/20159-sure-search-engine-optimization-strategy-multiple-c-class-ips.html The point seems to be that if your blogs are spread over at least different c class IP's, then you can links between them and create your own link juice. A typical set-up maybe to have one main site that is monetized and several others that live on separate hosts targeting keyword variations of the main site. These smaller satellites or micro sites all link to the main site and possibly to each other, and provide a solid structure for seo. This topic seems to be unresolved with differing opinions as to whether it works or not, whether just using different c-class IP's is enough or whether other factors such as who-is info, name-servers, geo-location and some even more technical aspects are crucial as well. One obvious way to overcome this would be to use separate hosts for each and every blog, hiding the who-is info and refraining from using adsense on them, keeping them purely for link sites. Basically covering your tracks in every way possible. As the internet grows, google and its tools are growing as well and it won't be long (if it hasn't happened already) before blog farms and the like will be easily detected and nothing but the most clandestine networks will be of any use. Of course to establish a network such as this, although not technically difficult, would involve more time and money to a point that it may not be worth the link juice that it provides. My question is this. There are millions of free blogging sites on the internet, popular examples are blogger and wordpress. We all know that one can own large numbers of these sites for absoloutely nothing and could use these as link sites, all pointing to our main sites. Are these sites however looked upon by the search engines as important enough to have any kind of impact in our link building. I can see that maybe the domain name may be a problem i.e. example.blogger.com could possibly be less effective than example.com Are there any other problems i am overlooking. Just seems to me that rather than pay for seo hosting on different ip's at around $5 per IP per month, there are millions of completely free ip's out there waiting to be used - o.k. it's probably a pain in the *** to log in and maintain these sites but if they are just going to hold a few relevant articles, how often would you need to access them. I get the feeling i am missing something major here and i hope that some one considerably cleverer than me can tell me. Thanks in advance. I would assume that most of these would have separate hosts, IP's etc.