If you think that's bad, Here in Canada most ISP's give you a fixed download\upload usage (mines 60GB). If you go over it they either:
1) Cut your service for the rest of the month
2) Charge you $1.99\gb (up to a maximum of $50)
Now you can get unlimited plans, but that's bundled with the super high speeds stuff, Which I can't get where I am.
Now they give you variant GB per month that you can buy. But since I go over regardless and the maximum they will overcharge is $50, I just bought the cheapest package, and consider the $50 max over charge to be part of my pseudo-unlimited usage plan.