"Sanergy produces toilets that are franchised to local operators who charge around $0.06 per use. Currently the company has two toilets serving approximately 150 each day. One is at Bridge International school (a for-profit school supported by the Omidyar Network), the other in Kibera, Kenya’s largest slum. These local operators keep all revenues. That, Auerbach says, is an incentive for them to clean, maintain and “market” the toilets." (Quoted from article)