The whole ink cartridge business is a money maker for these companies. You get a message that one is low you change it then it tells you another one is low and so on till you have changed them all. Plus cost has gone up a lot since printer was purchased. At least they work.
HP Inkjet Pro 9010 series is very sensitive to refills. Tried non-HP ink and it refused to accept it. OEM work fine but at twice the cost unfortunately.