Why? Because of the time it takes to do it.
Well this method has you creating 18+ backlinks to your site in just 5 minutes or less so that if you have many niche sites, it gets done quickly and it can all be free unless you want to spend $1.99 per month for one of the services.
You know you need backlinks for search engine optimization and getting them in this fashion gives your blog a better feel.
Go see the video on this topic right here: 5 Minute Backlinks