2 reasons to use.
reason 1
for black and white work. those inks are more expensive then epson inks
2nd reason
u cant compete in business at current ink prices and u need to reduce your costs
selling strickly on price is a shure road to hell
or u want to reduce your ink prices for your personel printing.
that means u are displaying cheep stuff in your home.
i've beeb there and done both of above. dont waist your time with that junk
ed