While elements of this method are old, as the OP admitted, it's been presented in the highly actionable, so-stupid-easy-it's-fail-proof format that newbies need. This is doable, IAW, and those who want to put $150 up to try it out can find out in just a few weeks if they will make the 700% return described. A few variations:
-Why not buy SB, and run your own searches to put tier II backlinks on your (parasite) Web 2.0 property?
-If you're going this far down the outsourcing road and paying Fiverr guys for the SB traffic, why not pay an extra $25-30 to have a writer and kw person do the kw research, and 3 articles per property?
-Why not write the equivalent of 1-2 more articles, broken into 5-10 100 word paragraphs that can serve as contextual blog comments being used by SB? This could make the links a bit more durable as far as conveying an air of authority to the links, as opposed to spam, and thereby keep the traffic coming after the SB operation stops.