Researchers conducted a randomised trial to assess whether providing food vouchers to compensate men for lost work time and travel costs or offering opportunities for lottery-based rewards could increase uptake of voluntary medical male circumcision (VMMC) in the Nyanza region of western Kenya. Their results are presented in this article, which was published in a supplement to the Journal of Acquired Immune Deficiency Syndromes about interventions to create demand for VMMC.