Of course. But that's not the point!
Of all the ways one could address consumer demand for a solution to a problem---bandwidth is limited---they've taken the absolute most indirect and cheapest route to address the problem. The keep the solution because it's so profitable (huge ROI because it's low cost), in spite of the fact that it doesn't actually solve the damned problem. We've seen this before: you're holding it wrong.
Companies' transfer caps treat the customer like an asshole: they sell you on the bandwidth, and then turn right back around and pretend that you're only paying for the privilege of a connection. Actually sending data across it at anything near a significant percentage of its rated speed is gonna cost you more. A lot more.* Better pull back on the using of what you thought you were paying for: An always-on internet connection with a[n ideally] 25Mbps speed.
Bandwidth and transfer are the same damn thing, and when you equalize the units, it's pretty obvious that you're getting screwed.
* Since we know how bandwidth works, this, too, is pure profit (or close to it, when peering fees are considered).