I'm in no way saying this cable is any good but the testing methodology is flawed and dose not proof mush.
The cables job is not only to carry the signal but also has to shield it from unwanted (RF)Interference and maybe carry Commen Mode ground currents.
The method of injecting 60Hz noise by a small transformer is crude and flawed.
Not only is the rejection of Audible frequencies important but also the rejection of RF.
Ironically the professional expensive gear is bad to test this because its good at filtering out RF even if the bad cable pics it up.
And the test did not test for commen mode current suppression.
Yes expensive cables are snake oil. but this test dose not proof this.
Since i could make a cable that would measure ok in this test but change the sound in the real world.