I have been searching around on the internet, having a look for some evidence to indicate why I should bother maintaining a nofollow structure on any software I write. It was originally a concept by Google, back in the Pagerank beta, to combat the abuse of link-based spam, but many predicted its failure. Has it really done anything? Well the numbers say no.
The first point that I would like to make is that the actual numbers of link spam has increased 100 fold. You can see that by looking at …