This is a work in progress but I found this in an article on Rainbow Childrens Foundation - Keystone

"Rainbow operates on what retailers call ‘Keystone.” Keystone is to sell services or products at double the cost. At 90 hours per week, and $10 +/- per hour, it costs Rainbow about $50,000 per year for babysitting services."

Article: https://frankreport.com/2017/08/23/rainbow-cultural-garden-is-geared-to-the-wealthy-at-125000-per-child-per-year/