How did european countries attempt to profit from their african colonies after world war i?

They heavily taxed indigenous africans and required them to pay in cash.

It has to be considered first of all, that France and Britain kept their imperial rules in their African colonies. This meant that added to their territories in Europe, they were also taking the African colonies as part of their countries. After the war, the colonies in East Africa, which used to be under the control of the German, got into the hands of Belgium and Britain. The French and British led economic expansion from those territories, expanding their civil administrations as well as intensifying capitalist integration. Both countries considered that they were reestablishing the productivity of the African territories after their loss by the Germans. There was an amplification of political and also land privileges for France and Britain. Both countries were hoping that this expansion would bring about economic advantages as well. This annexation so as to call it, included the demands of minerals and agricultural resources needed by many nations around the globe. All resources were now commanded by France and Britain and some small portion by Belgium.