I thought I read here that salt will rust out your melter? Perhaps if it is mixed with wax this may not occur.
People are used to purchasing wax melts and perhaps don't know they can use salt alone with the addition of FO in their melters.
I would advertise it as a new type of melt, call it something special and different.
Off the top of my head: "A Super Melt" (Lame I know, but you KWIM).
That's all if it proves itself to actually last longer...