Starwood Preferred Guest has sent out an official message announcing the end of their partnership with Uber effective December 17th. Until then, you’ll continue to earn 1 Starpoint per US$2 spent with Uber every day and 2 Starpoints per US$1 spent during stays. SPG and Uber first introduced their partnership in 2015.
You don’t need to take any action. Your SPG account and the Starpoints you’ve earned to-date with Uber will not be affected and you can still earn through December 17, 2017.