Deal Link:
https://www.paypal.ca/starbucks
Expiry: Sep 26, 2016
You can top up your Starbucks app (minimum top up is $10) from September 12, 2016 to September 26, 2016 and get $5 off. Just choose to pay with PayPal at checkout, your offer will be automatically applied to your purchase. Limited quantity available.
BTW, if you have multiple PayPal accounts, you can use them separately.