Linkamotion is a private blog network which allows you to post to their private blogs for a monthly fee. They allow Spun Content which means you don’t need to write unique content, but it’s recommended to help the index rate. There are currently hundreds of blogs in the network, all varying of different IP addresses and pagerank.
Here is the video explaining the test. To summarize, this was done over 5-6 month period linking back to backlinksvault.com with the keyword phrase “buy backlinks”. It was ranking 38 to start, and now can’t be found. I do not recommend this service.