This is interesting - a musician that funded her album with Kickstarter and is now crowdfunding her tour, only playing venues where people indicate interest first and selling tickets before booking the venue. Paul F Tomkins does something similar.
"The pricing feature has another purpose: prohibiting drivers from generating profits on the rides they give. This is distinct from apps that let users summon a driver on demand, such as Sidecar, UberX and Lyft, which all promote the idea that everyday drivers can make a living using their platforms."