I'm guessing it's just to avoid something like this ... http://arstechnica.com/information-technology/2013/05/fios-customer-discovers-the-limits-of-unlimited-da

I'm guessing it's just to avoid something like this ... http://arstechnica.com/information-technology/2013/05/fios-customer-discovers-the-limits-of-unlimited-data-77-tb-in-month/ http://arstechnica.com/information-technology/2013/05/fios-c...