Amazon offers vouchers in exchange for tracking activity U.S. shoppers received a $10 voucher in exchange for their usage data to train Amazon's Assistant as part of ‘Prime Day’. The Assistant, which has over 7 million users, is a browser add-on that compares online retailers’ prices with Amazon’s. Read more.

Budget hotel company OYO acquires co-working startup The Indian company, which has received $1bn of investment in ten months, paid $30m for Innov8 to operate as the OYO Workspaces premium option. The spaces will offer discount season passes and services including housekeeping. Read more.

Uber’s MLU buys Russia-based Vezet for $204m Uber’s Russian joint venture with Yandex, MLU, has acquired taxi-operator Vezet for shares and $71.5m in cash. The joint venture has plans to invest a further $127m in the Russian regions over the next three years. Read more.

Serena Williams and Mark Cuban invest $3m in Mahmee The network for new mothers aims to fill a critical gap in postpartum care. It is estimated that 20% of women suffer from postpartum depression, Mahmee – a subscription-based service – acts as support network, offering access to maternity coaches. Read more.

City pantry purchased by Just Eat Just Eat has entered the B2B catering marketplace with the acquisition of City Pantry for an initial £16m. City Pantry links caterers and restaurants with businesses to provide food for their employees. Read more.

Kencko secures $3.4m in its seed round The startup offers pre-mixed drink packets made of 100% organic fruits and vegetables. Kencko plans to use the new capital to develop its direct-to-consumer strategy, which currently allows customers to personalise their orders and schedule deliveries. Read more.