So this came out fairly recently, Starbucks issued a statement regarding people's accounts getting stolen on the mobile app, and in turn using their gift cards.
http://www.cnbc.com/id/102675698
and
https://fortune.com/2015/05/13/starbucks-cybersecurity/
@Krish
http://www.cnbc.com/id/102675698
and
https://fortune.com/2015/05/13/starbucks-cybersecurity/
@Krish