Cost Per Link Is a Lousy Metric
Typically what happens is that an SEO is performing work on behalf of a client, or the company they work for. They are diligently adding incoming links. Then the person managing the SEO does a calculation, looking at the money spent on the SEO, and the number of links acquired.
For example, if you have an in-house SEO getting paid $8,000 per month, and they obtained 40 links for you last month, your cost per link is $200. So why not try to drive this cost per link metric down?
The reason is that it will drive you to acquire crappier and crappier links. What the metric ignores is that all links are not created equal. In fact, a high quality link can easily be 10,000, or even 100,000, times more valuable to your web site then one of those crappy links.
<Read more of Eric Enge’s pithy and insightful analysis>