Groupon has $10 Starbucks eGift Card for $5.

Expires Dec 31st, 2014. Limit 1 per person
Hurry the deal ends soon.
Buy here

Over 100,000 Purchased, I would venture that the number is way over 100,000 purchased.

$5 for a $10 Starbucks Card eGift
A Starbucks Card eGift is a digital gift card that can be used towards any purchase at your local Starbucks coffeehouse or Teavana store. Treat yourself, or you and a friend to your favorite drink. Use it all at once or across multiple visits in participating stores.

Starbucks

Since 1971, Starbucks Coffee Company has been committed to ethically sourcing and roasting the highest quality arabica coffee. Today, with stores around the globe, and products in grocery, the company is one of the premier specialty coffee roasters and retailers. Through their unwavering commitment to excellence, they bring the Starbucks experience to life for every customer through every cup.