Not only paying them to be snitches, but literally training them and giving them access to law enforcement tools and lists of targeted individuals. Just the kind of power you want give the clowns selling you an Apple Watch.
There is so much "there there" in the story and deeper questions. Was Best Buy aware? We're their managers aware? Was anything buried in Best Policy TOS or etc when one take their computer into fix allowing it that people "consented"? Is the FBI telling them not to report what they found to local LEOs but only to them legal (some places there are laws that if you find something like illegal porn, child abuse, etc you must report it?) Did any Best Buy employees use these tools for their own use (identity theft, hacking, or extortion of people who took their computer in with illegal material in it?) And, like with StingRay, the LEO using the "tool" but covering up how they found the information in indictments so that the technology used doesn't become known or so judges don't throw it out of court for some violation. Does the Best Buy stuff come up in discovery during prosecutions? (StingRay didn't.)