I can see what their thinking here. Your out and about, maybe in a cyber cafe. Cyber Cafe doesn't have something M$ owned that you need, per say microsoft word. So you can either download microsoft word from their website. Install it. and then for £2 a time inserting your credit card you have access to it for say so many prints, or for 4 pages of writing or something like that.
I have to agree though, another piss poor idea.