I'd read the fine print. I bet what they do is find a keyword that has low-med competition that is related to the desired keywords. Then they work (probably through not so honest techniques) to make you tops in the category.
My advice, or what I'm doing right now for my startup site, is to make social media the center piece of my seo campaign. Basically I use social to create honest converstations about my keywords and topics. This (eventually) leads me to posting and guest blogging on high readership blogs.
Not a 30 day technique. But might be more sustainable.
