[icebraining]

Not true, see e.g. Museumkaart, which is a non-profit foundation created by the Dutch museums that sells cards for accessing them for a flat fee.

https://en.wikipedia.org/wiki/Museumkaart

[gbl08ma]

For a perhaps more well-known example, see the Raspberry Pi Foundation. They sell, obviously, Raspberry Pis - a lot of them. They are a charitable organization, which is a type of NPO.

https://en.wikipedia.org/wiki/Raspberry_Pi_Foundation

[icebraining]

Yes, but that's in the UK, I was giving an example of a Dutch non-profit.