DoorDash is struggling to dash away from controversy clouding its pay structure, and the San Francisco Office of Labor Standards Enforcement is now launching an investigation into the startup's tipping policy.
DoorDash and fellow delivery provider Instacart have come under fire recently for a model that accuses the fast-growing companies of deceptive tipping policies. The companies — collectively valued for more than $11 billion — acknowledged subsidizing minimum wage guarantees with customer…