Delivery Three Kingdoms escalates! Just after DoorDash swallowed Instacart, Amazon (AMZN.US) teams up with Uber (UBER.US) to offer perksPrime members get free delivery on orders of $25 or more.

Zhitong Finance APP has learned that Amazon (AMZN.US) is adding Uber (UBER.US) food delivery benefits for Prime members on its shopping website, forming a deeper partnership. This comes just one week after competitor DoorDash (DASH.US) agreed to acquire Instacart.