The only problem with this is that it's no more than a compression system which reduces the file size to get it down the line quicker.
Great! You say ... why doesn't everything work like that?
Well, it takes time to compress the file before it's sent over the wire, and then it needs to be decompressed when it gets to the other end. This takes time, so it could actually make your internet connection *slower* in some circumstances.
The other problem of course is that a lot of internet content is *already* compressed - jpg images, media files like MP3s and video, and so on. You can't get any more compression into something if it's already been compressed (efficiently!).
Given that most of the stuff you download over broadband is going to be images, music and video ... there doesn't seem to be much attraction to me.
What I can't work out is why you'd pay a tenner a month for it! If you're already paying for an ISP and spending about a tenner a month, then add another tenner a month and you've already got the price of a broadband connection which you can use 24/7 with unlimited download and a much, much higher connection speed.
It's a great idea and I'm sure it works, but it whiffs of snake oil if you ask me...