Download the Starbucks mobile app and purchase $10 in credit via Visa Checkout. Then you will receive a $10 Starbucks eGift Card to the email address associated with your Starbucks account within 24 hours of the load.
Just click to add a card via Visa Checkout and reload $10 to your account to qualify.
The terms say “you are not guaranteed to receive a bonus load. supplies are limited.” but does not specify how many people will be eligible. With past promotions the promotion page would display when it is full.
The Promotion Period runs from 9:00 AM PST on 11/29/16 and ends the earlier of (a) when all Bonus Loads are distributed or (b) at 11:59 PM PST on 12/22/16.
You can use the eGift card to reload your regular Starbucks card.