[WillyF]

If you're building a business in the SEO industry, you probably shouldn't throw around guarantees like that.

I think that this method is probably safe, especially if you the target site has a decent number of higher quality links. Still, it does come with some risk.

It wasn't long ago that Matt Cutts told us that duplicate content was ok and that Google would find the canonical version on its own. Then Panda came along. It was a widely held perception that incoming links couldn't hurt you. Now we know that they can.

Google's algorithm is a moving target, and it only seems that they will get more aggressive on discounting or even penalizing links that aren't given editorially.