or 4 (perhaps the most benevolent possibility): They'd rather use the fear of the unknown as a bigger deterrent against further pursuit of CP than getting a han

or 4 (perhaps the most benevolent possibility): They'd rather use the fear of the unknown as a bigger deterrent against further pursuit of CP than getting a handful of convictions. People who are involved now or thinking about it may stop or never get involved at all if there's > 0% probability that the feds are holding on to a working 'sploit.