Maybe. That drugstore chain mainly sells hygiene products. Their "main" side-business is printing photos, both digital and on film. (Yes, even in 2024 in Germany it's still possible to hand in your film in a small drugstore and have the photos developed and ready for pick-up a week later.) So I guess printing on normal paper is just a side-side business that developed naturally.

Anyway, the 10c/page (A4 b/w) is still a good estimate, at least when I looked pre-pandemic (it might've increased slightly to 12 or 15c by now). A lot of cities, especially those with a University, have dedicated small "Copyshops" where you can walk in and get your 100+ pages thesis printed and bound within 20min. So the prices and service are aimed mostly at Students. It's true colored pages are significantly more expensive than b/w, but overall that's still cheaper.

> That's a supermarket though where they hope you buy other stuff.

And why does that matter? If there is a shop (idc how it's called) that lets me print for 10c then I chose that.

> Though already colored pages cost 55 cents.

The GP was about documents that you may have to send in / bring physically. I've never seen such institutions demanding the forms being printed on premium paper in color.

Looked at one local print shop. It's 5 cents per page plus 1€ per order. Of course this is in an area with multiple competing print shops but your assertion is at least not true everywhere.

While dm might hope you buy other stuff from them you definitely don't have to. If you are suggesting that their print service is a loss leader then please show some evidence backing that up.