No it isn't. One of the things I need (or at least want) is the ability to check my broadband data usage even though I am on an unlimited package. How do I determine if my usage is not that high so could save money by moving elsewhere to a capped package?
You can not check it through your MyBT. I would imagine that will be mainly because very few ISP provide a chargeable usage package so it is not something that the vast majority of people want or ask for.
If you want to get some measure of your unlimited usage you can log onto your BT hub and check your usage there. Once logged onto your hub go to the advance settings then Technical Log. It may not be 100% accurate depending on the period over which you want to check but it will put you in the ballpark.
What ever!