1017
The Printer That Simply Worked
(media.mas.to)
Post funny things about programming here! (Or just rant about your favourite programming language.)
They need the colour ink to print the tracking dots :)
https://en.wikipedia.org/wiki/Machine_Identification_Code
https://www.bbc.com/future/article/20170607-why-printers-add-secret-tracking-dots
With how expensive colour ink is, that's also stupid