This has been around at least 9 months or a year. I remember being solicited this service through and old Two-way link builing service provider we used (which of course was looking to compensate for his lost business). I don't like buying link at any capacity so did not act on it, but I know a two sites that ended up using them. One was very happy and i think still use the service (and claims he saw improvements in his SERPs), the other (which is the more credible one I should add) did not continue with the service.

In summary I think if you are ok with the concept of Link Buying (I am not, but I know some are ok with it), and you don't want to wait on getting some additional support on your relatively new site, I guess it is ok to make a part of your package. But putting 50% of your budget in this is no good. I still would not do it. There are a lot more better, honest and smart ways to get links.