[Polymarket Hires Former Uber and Bird Executive Travis VanderZanden as Chief Growth Officer] According to The Block, prediction market platform Polymarket has hired Travis VanderZanden as its Chief Growth Officer. VanderZanden is the founder of the electric scooter-sharing startup Bird, a former head of growth at Uber, and a former executive at Lyft. He is also one of the prominent figures representing the 'blitzscaling' model. VanderZanden's appointment comes as Polymarket seeks to further expand its user base and market share.