Re: It's important this is done openly
The Register's excellent article on this dated 2nd July 2020 claims that in the UK there were around 10,000 subscribers, and that police had made 746 arrests. If the "over 1,000" arrests referred to in (a UK) court were in the UK only, that would make the relevant subscriber figure 10,000, not the 60,000 you note.
To which you will (correctly) reply, "What about the other 9,000?" I would agree with you that the notion that the service was solely for the use of organized crime gangs is a strong assertion to make in court. This story is likely to run and run over the next few years.