Log in to your Comcast account, and on one of the primary tabs will be the amount of bandwidth you've used this month and the totals for the previous two months, along with a clear specification that you get 250GB/month (and how fuzzy they are willing to be about that), and some FAQs about why. Market-speak about why, yes, but still, it's there. It's all there now, and has been for at least a year. And they clearly announced this at the time they put it in. The only thing they don't have is the easy API for finding this out automatically.

Unfortunately my login details are not where am I am right now and I can not give you directions straight to it, but it's not that hard to find once you jump the hurdle of finding your login.

When I think of "transparency" I'm thinking more about transparency up front -- before you're a customer. If I can't make an informed decision without spending hours looking through terms and conditions information then I don't think it's "transparent".

Also, I just spent 15 minutes poking through the comcast.com website without finding any mention of a 250GB/month limit. I did a search for "250gb" (it even came up as a suggestion from their search engine) but it told me there were no results for that search query.