A brief questionnaire module for participants in the intervention group will assess their experience at the last assessment. Items will assess level of satisfaction with the intervention, perception of its fairness and transparency, whether they perceive the intervention to have influenced their behavior and which HIV prevention strategy that they learned during the intervention have they been most likely to employ. Participants will be asked to indicate whether more or less frequent awarding of prizes or a different prize value would have influenced their adherence to more frequent HIV testing and other behaviors of interest. These items will use a 5-point Likert scale to rate level of agreement with statements. Finally, participants will be asked open-ended questions to elicit feedback on aspects of the program that they liked or did not like, and any suggestions for how the program could be improved.