Why I use compatible inks

Epson keep pestering me to use their own inks - after I made the following comparisons between Epson genuine inks and compatible inks guess what I decided to use:-

Epson Inks 6 x 7.4ml £49.99 = £675.54/100ml

Compatible inks 6 x 19ml £16.97 = £89.32/100ml

Why I use compatible inks