Update: I purchased a drink yesterday and today and have not seen any codes in my app - others posted the same in this thread and have had success contacting support for stars credited to account (I have also had success with this).
Targeted offer so YMMV (thanks DoctorFunk)
Just got this in my Starbucks app inbox:
Come in between November 24 – 26 and purchase your favorite drink or bite to eat, and we'll load a coupon for a free handcrafted drink to your account within 24 hours.*
Your free drink coupon will be valid for 7 days after it's loaded to your account.
Check the pay tab in the app, or ask your barista to use it.
*At participating Starbucks® stores. Some restrictions apply. See starbucks.com/terms for details.
Make a purchase from 11/24/17 – 11/26/17 and receive a coupon for a free handcrafted beverage to be redeemed at a participating Starbucks® store. Must pay with your registered Starbucks Card/App. Your coupon will automatically be loaded to your account within 24 hours of a qualifying purchase. Coupon good for seven (7) days from load onto account. Excludes alcohol and Starbucks Card purchases. Not available for online purchases. This offer is exclusive to you and this Starbucks Rewards™ account, and cannot be reproduced, transferred or used by anyone else. Coupon may be redeemed once.