Ubufakazi nokuvumela, ikakhulukazi labo osaziwayo abasezingeni eliphezulu, abalingiswa bezemidlalo, nabanamandla, kungakhanyisa ukukhanya okubalulekile emikhiqizweni nasezinkonzweni zenkampani. Abakhangisi nabathengisi bangabona ukwabelana kwemakethe okubalulekile nokukhula kwevolumu yokuthengisa. Kodwa-ke, kungase kube nezingozi ezihlobene nokuvumela okunjalo nobufakazi.