> And they have the necessary pipes to serve the rate they sell you 24/7
I doubt they have those pipes, at least if every of their customers (or a sufficiently large amount) would actually make use of that.
Second question would be, how long they would allow you to utilize your broadband 24/7 at max capacity without canceling your subscription. Which leads back to the point the person I replied to was making: If you truly make use of what is promised, they cancel you. Hence it is not a faithful offer in the first place.