It is a low level scam. You are making bleach by electrolyzing a dilute solution of salt and vinegar.
I say low-level because it isn’t exorbitantly expensive, but you can achieve the same effect by buying a bottle of Chlorox, or a store brand.
If you gently sniff the solution it makes you will find out that it smells just like bleach because it is.
As long as it works I am happy with it, water and salt and I make a disinfectant water for years.