No, a stingray is an active surveillance method... the authorities deploy it and can get information from that point on. It is generally used for an active investigation against a target; of course, it is super problematic because it also intercepts innocent people's calls and can track them, and it is also being used for more and more cases where it is not justified.

However, it is still not the same as the phone company selling location data. They have EVERYONE's location data for all time; it is not like they have to 'turn it on' for you and then are only able to spy on you going forward. They just have all of it, all the time.

The difference is that a stingray is like one cell tower being able to spy on people... the phone company is ALL THE CELL TOWERS being able to spy on you... and not only being ABLE to, are just always doing it no matter what, for everyone.