Yes, I have helped over 1000 people so far. As for the cord hardening, I store the new Koss headphones for long time periods and they do not harden like when I play Tinnitus Mix, in my case the cords do not touch my skin because I sleep upright in a recliner with a neck pillow.I hope you're right and your file is curing people though I am still skeptical.
As for the hardening of the wires, have you tried to run the headphones for a week without wearing them? I guess that would distinguish whether or not it is happening from the sound or oils. I think a really good experiment would be to have 3 sets: One playing your file, one playing random music and one as a control, maybe just sitting there. Then you could measure the hardness of each one over a period of time. I would think 1-2 weeks continuous playing would do it.
The cord hardening is the direct result of Tinnitus Mix generating the 2.8 MHz.