Well I know it's a usability issue, but my superior doesn't care about it, he only cares about SEO, and he thinks that technique (that one of our competitors is using) will also be good for our website.
So that's what I'm trying to find out, why are they using it. And the main explanation I find is to have one single category page, with 10 links that get a lot of traffic, since links never change, only the content they point to.