They have to print the invisible printer identification dots somehow.

Who needs color anyway? A black laser printer is the way to go :)

My Brother monochromatic printing ~3000 pages per cartridge going brrrrrrrrrrrrrrrrr

doesn’t help that printer ink is one of the most expensive liquids in the world and the whole business model of printer companies is based on selling overpriced ink, so much so that they sell printers at a loss and then try to block out third party cartridges