Various regulatory influences
Didi supported by Chinese government’s endorsement of ridesharing services
Uber variously blocked or actively supported by many local governments
Ugly wars with traditional taxi companies, etc, who fought over whether Uber should be defined as a taxi service or not
Lyft attempted to circumvent taxi rules by not charging riders, but asking for a ‘gift’ to the driver
Uber negotiates to pay airports for access to pick up riders
Uber will pay tickets for drivers in some jurisdictions if ticket is related to being a ridesharing provider