The software that tracks usage is part of the same software package that allows the Telus stick to access the internet. The software will tally your usage after your session ends and display it next time you connect. As far as I'm concerned if they are capable of tracking usage they should be able to simplify the whole affair by putting together a piece of software that allows the user to limit their own usage or cost, display an actual cost per Mb being downloaded, a tally of the total cost per session, and total monthly usage/cost.
I think it's about time the law was change regarding this type of crap being pulled by the cell companies.