Hahn drew cartoons against the Dutch monarchy and Abraham Kuyper (prime minister 1901-1905 and founder of the Anti-Revolutionary Party.

Other contributors to De Notenkraker included Anton Kristians (pseudonym Toon Krias) and starting in 1920 the Belgian George Van Raemdonck.

Het Volk and De Notenkraker chiefly criticized the close relationship between the monarchy and the capitalist bourgeoisie.

At the end of 1918 De Notenkraker has about 8000 subscribers, compared to about 30,000 for Het Volk and almost 40,000 SDAP party members.

After Funke Küpper's death other socialist publications became popular with more photographs such as Wij and the VARA Radio Guide.