We give the customer the choice. It has been very important to us to allow customers to choose how they control their household expenses.
The choice we give customers is that if they go over their monthly data quota, they can choose to purchase additional data that way. Or if having a fixed price is more important—and this has certainly been surprisingly important to a number of our customers—we do slow down their speed at that point.
It's up to them to choose which one they would prefer.