Do you own one, Glory?
I have tried one (loaned from a friend). It did make some difference in my interconnects, but I couldn't justify the expense for treating two or three pairs of interconnects a few times a year. However, I can definitely see where it makes sense for a cable manufacturer to own one, or for an individual who changes wire frequently.
Bottom line, it's a price/value decision for each individual...just like with most tweaks.