Very often people do have killer content, but they still don't get traffic/backlinks... Link buying is not a bad idea in itself if done properly. However, having 40 edu backlinks done over a short period of time with no educational relevancy with your site will do more harm than good in the end.

I agree with Marisa, I had similar experience... In the end my domain was blacklisted and I had to move my site.

I bought a few facebook likes and it was a waste of money. Users who "liked" my page were fake... I wasn't expecting much from these likes and I did it because I wanted to make my brand new fb page more likeable. You need to start somewhere, right? No one wants to be the first person to "like".