Buffer (pumper) sites are passing strong link juice from link layers below them straight to your main money site. This technique is extremely safe because you are not getting large number of links directly to your site, but quality links from high PR Web2.0 platforms with content related to your keywords. Having network of buffer sites that grows over time is proven method for stabile SE ranking. Each Web2.0 property is made manually on the most popular and highest PR platforms. We use unique articles for each of Web2.0 sites in Tier 1 Layer. We don’t use any software in order to ensure these links stay up as long as possible.