Earlier quoted context omitted.
And simultaneusly: - not have any indication their tools were used - canceled the relevant accounts Which "relevant" accounts if NSO's tools weren't used?
I think it's pretty clear by now that they have 100% visibility into the entire exploitation chain for all of their customers. Their "official statements" mean nothing.
NSO is very popular with governments that don't have robust domestic intelligence because all you have to do is type a phone number into a web form and in anywhere from an hour to a week you get a point and click GUI for accessing the contents of the phone.