How often do you change the ink in the printer?

Hi. I constantly gamble and make money at https://book-of-ra-slot.com/casino-25-euro-bonus-ohne-einzahlung/ so constantly busy putting my bank accounts in order. After all, you always need to account for your income to the state and pay taxes. Recently, ink runs out faster and faster, although the number of printed papers has not changed. What could be the reason for this?