Why do manufacturers stop making products that work?

My favorite over the counter hair product is discontinued!  Why? Because the company was purchased by a new company and it was let go.. ugh!

I don't understand it... never will... but now my search continues.  In it's place I've resorted to using a product that covers the gray (in-between touchups) but doesn't have the clean feel that I'm looking for.  So for now I have to recommend Fullmore as my go-to easy to apply temporary color.  I have clients that use it and are satisfied for the most part.  It will smudge off (think of it like makeup for the hair) on pillowcases if you sleep with it in, but it washes out and doesn't leave a stain.