Joined: 04 Jun 13
13 Feb 14 1:22 pm
With tiered link building its the sheer mass of links built in a structure that emulates the web. Building links to links in such high volume passes link juice down all the tiers to the money site. The Google algorithm is built around this is almost powerless to stop it despite what you hear - until the next spam filter gets run anyway.
Obviously the .edu and .govs don't harm it and a white hat version ideally would have these links plus a less spammy link profile made up of original content. Bear in mind any kind of link building is black hat really.
I don't know how long it will last. Depends when Google runs the spam filter next... A few weeks, months maybe.