Re: Openly intended for criminal use according to whom?
No down thumb from me; fair question. Naturally my original comment is predicated on the claim being true; It was made by both the prosecution and the NCA; no counter-claim by EncroChat or it's users was reported (perhaps for obvious reasons).
If it's not actually true, then I would withdraw my support for this approach, just as I wouldn't support general TLA cracking of Signal, Tor, etc, since these clearly are not the means of communication of 'solely' criminal gangs.
That said, I'm not sure the disjoint between subscribers and arrests need signify anything other than that TPTB haven't caught up with all the wrongdoers as yet. The number of reported arrests has grown by ~250 since the June report.