According to the article, the data was being made available to other businesses... From the detail level involved, I imagine the NSA has some sweeter deal with telcos... And they have much richer data.
<https://www.ecfr.gov/current/title-15/subtitle-A/part-4a?toc...>
https://en.m.wikipedia.org/wiki/Fourth_Amendment_to_the_Unit...
In either regard, unambiguous comments are preferable to ambiguous ones.
The principle function of speech or writing is to accurately convey one's own state of mind to others.