AT&T bought into a significant amount of DirecTV - so much so that everything that had the DirecTV logo on it was changed to the AT&T logo, such as the invoicing. So the AT&T customer base has included, for several years, the Directv customer base. The article doesn't attempt to clarify who the 'nearly all' customers are, and some people will jump to the conclusion that it is the cell phone customers. But it could include the DirecTV customer base whose data is also at risk.