Starbucks Corp., the world’s largest coffee-shop operator, last week issued an online coupon though Groupon Inc. in a bid to bring new customers into its U.S. and Canadian stores.

“It was just a really great offer for us to be able to give to our customers,” Linda Mills, a spokeswoman for the Seattle-based brewer, said in a telephone interview. This is the first time that Starbucks has used Groupon, she said.

Customers who spend $5 on the coupon get a printable gift card to use in stores for $10.

After the Starbucks deal was introduced, the site to buy it stopped working.

“We’re experiencing a huge reaction to the offer, so it’s temporarily down,” Mills said on March 22. “It should be up and running very soon.”

Last year Starbucks did similar deals through Google Inc. and LivingSocial. The coffee seller has more than 11,100 shops in the U.S. and about 1,190 in Canada.

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