I've cracked my ISP!

There are few times that I actually get the feel that I have a 256kpbs connection, one of them is right now. The pages load quickly, downloads are at the speed of sound and videos don't have loading time (save for some high quality ones).

As per what my Mom told me, my internet was supposed to have been only for a 15hr period. Because thats what she paid, for the 15hour pack. Well guess what? It's not! How is that possible? I have no idea.. maybe I did it on accident. My internet has been on for the last 76 hours, downloading Assassin's Creed (which was eventually corrupted), movies and some albums. I've disconnected and reconnected numerous times, but I always got through. How do I do this? Well, all I know is that I created a separate connection with the same values as the dialer they provided. I don't use the ISP software to connect to the internet, and hence, they probably think I've not used any internet hours at all yet. Cool no?