Very interesting. From the article:

>I am not aware of another agency that was banned by Google for this practice.

Isn't it possible that Google caught iAcquire buying links (or engaging in some other form of SEO spam) for their own domain, and that's why it was delisted? If they were willing to do it for clients, certainly they were willing to do it for themselves.

On an unrelated note: check out the first comment thread on that article. Each response gets thinner and thinner until it is finally just a single character on each line. That's fun.