Starbucks was thanked for its support of gay marriage on Wednesday with a giant card signed by over 640,000 people.

The groups and Washington United for Marriage delivered the card to Starbucks' Seattle headquarters yesterday at noon.

The card was accepted by two Starbucks representatives.

“We are long-standing supporters of a culture of diversity, and inclusion and equality for everybody, and I'll share this with our fellow leaders,” said James Olsen, vice president of Global Corporate Communications at Starbucks. “Thank you very much.”

The campaign to thank the coffee giant was launched in response to the National Organization for Marriage's (NOM) “Dump Starbucks” boycott.

Starbucks has said the boycott was having no impact on its business.

“We're not seeing any impact,” Starbucks spokesman Zack Hutson told Seattle alternative The Stranger.

“We knew that people would stand with Starbucks for standing up for marriage equality, but this response is amazing,” said Zach Silk, campaign manager for Washington United for Marriage. “This kind of consumer support shows why so many Washington companies recognize that all loving, committed couples should have the freedom to marry.”

As of Thursday afternoon, supporters were outpacing opponents 22 to 1, with more than 642,000 people signing the thank you card and just over 28,300 pledging to avoid Starbucks shops and its retail products.

NOM is also fighting off criticism that it pursued a strategy to pit minority groups against gay marriage supporters.