The reason they remain so well hidden as a scam is because they use Google SEO tricks t hog up the first page of search results but if you look at pages 2-12 you will freak. Gi2c Reviews According To Google and DuckDuckGo.com - China Job Scam or Legit? | Open Letter

They also hire a full-time hacker to remove the most negative reports about them online as explained here http://chinascamreport.wordpress.com