In the US, and on wired connection maybe. In NZ the largest mobile plan I can even find has 5GB. Another one with flat rate for data is $50 for 3GB (so $250 for this 14GB day). If I load a webpage on my mobile data that uses 10MB of data, I want to know about it so I can shut that down (and never come back.)
But if we change to a utility like model people will start caring about penny pinching their bills