Christianity was successfully spread throughout Africa because the first missionaries indoctrinated young children. They passed on the new beliefs to their off-spring, and so on. Voodoo used neither of these methods and has therefore been unable to spread throughout Africa. More still because other cult practises such as Juju were available to provide major functions of helping cure and providing spiritual fortification. Finally, African traditional beliefs, as far as they can be called African, do not link Heaven with earthly activities.
African belief is basically the humanistic belief that doing good is good.
You are rewarded here on earth for your good deeds and punished for your iniquities. Indeed, many Africans believe that the ultimate punishment for bad or iniquitous behaviour is death. Exportable mysticism However, if voodoo was successfully exported to the Caribbeans, it is possible that other sects and cults can be exported elsewhere. The Akonedi sect in Ghana has taken in initiates from the United States who have set up what is said to be a very successful shrine in the New York area. Ironically, that export seems to have literally taken the spirit out of the parent shrine which is on the point of collapse.