Check your rewards offers in the Starbucks iOS app, and also check your emails. Starbucks and Bakkt are offering a free $5 gift card when you add Bakkt as a payment method for your Starbucks Rewards account. Only works on iOS app, cannot do it on android or on the web. You do not have to purchase anything, just add your Bakkt account as a method of payment. If you dont have a Bakkt account, it was very easy to create one...no SS# or CC needed. Easy $5 !!
Again this is YMMV and targeted.
Title of the email I recieved was "Starbucks® Rewards members, meet Bakkt® 🤝"