There will always be something to buy (Yelp: http://www.buyyelpreview.com/ http://www.buyyelpreview.com/ YouTube: http://www.ytview.com/ http://www.ytview.com/,

There will always be something to buy (Yelp: http://www.buyyelpreview.com/ http://www.buyyelpreview.com/ YouTube: http://www.ytview.com/ http://www.ytview.com/, via a quick Google search). Overall it links are a very successful metric (the pagerank algorithm changed the search game), but it's more about the sophistication of the engine to detect and demote abuses.