This didn't seem interesting to me, because there's so many ways to scrape a site, in every high level language, that learning one more way to do it is going to be a diminished return...and I also didn't know that "Factor" was a language.

The OP's template could have some more info on what Factor is, but there's a few links, including this wiki for it: http://concatenative.org/wiki/view/Factor/Learning

I honestly didn't know what a "concatenative" language was until I saw that "Six programming paradigms that will change how you think about coding" post that fronted HN last week:

http://brikis98.blogspot.in/2014/04/six-programming-paradigm...

So this is just a long way of saying...after just learning about concatenative languages, I'm really interested in what that paradigm brings to a common task...maybe there aren't productivity gains, but I love learning different philosophies of coding, and thanks to the OP for showing one practical example.