Any more evidence?
There is a strategy called Spamdexing
. It is evident that the website this guy is working for is #7 in google's results, at least in part it is thanks to his efforts.
Guys like this sell their service for a one time fee $50 or so and will put your website within the first few pages of most popular search engine results with your personally selected key words. Garbage posts like this in popular community websites seem like a popular method.