Advertising "unlimited" leads to the need for limitations like that. A wireless provider probably can't provide 1TB of data for a monthly price that most customers are willing to pay.
Service with a fixed data limit, however should treat all data the same.
That's convoluted and difficult to describe, much less enforce.
Here's a better method: All advertising must be truthful, and all details must be spelled out plainly and visibly.
If the price seems great but there are gotchas, then: Keep the gotchas in plain sight so that a consumer can make an accurately-informed decision without having to go dig in the bottom of a locked filing cabinet stuck in a disused lavatory with a sign on the door saying ‘Beware of the Leopard.'
No fine print. No asterisks. No illegible footnotes. No man behind the curtain. Just truth in advertising.
Service with a fixed data limit, however should treat all data the same.