http://readwrite.com/2014/12/19/square-starbucks-mobile-payments-partnership-over http://readwrite.com/2014/12/19/square-starbucks-mobile-paym... Of relevance

http://readwrite.com/2014/12/19/square-starbucks-mobile-payments-partnership-over http://readwrite.com/2014/12/19/square-starbucks-mobile-paym... Of relevance - Square is still a backend payment processor for several companies, even if it doesn't have the device on the front end. They still process payments for Starbucks, in lieu of Bank of America. It is not clear whether they make any money at it, though.