On Sunday morning, Taylor Swift took Apple to task for the royalty agreement on its news music streaming service. Her open letter on Tumblr, titled “To Apple, Love Taylor,” said, “I’m sure you are aware that Apple Music will be offering a free 3 month trial to anyone who signs up for the service. I’m not sure you know that Apple Music will not be paying writers, producers, or artists for those three months. I find it to be shocking, disappointing and completely unlike this historically progressive and generous company.”

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“Three months is a long time to go unpaid, and it is unfair to ask anyone to work for nothing,” the pop singer argued on the behalf of music-makers everywhere, many of whom had voiced their discontent with the royalty policy. She concluded her letter saying, “We don’t ask you for free iPhones. Please don’t ask us to provide you with our music for no compensation.”

It was a sentiment shared by many independent music artists and producers. Just a few weeks earlier, the American Association for Independent Music had chimed in, “Since a sizable percentage of Apple’s most voracious music consumers are likely to initiate their free trials at launch, we are struggling to understand why rights holders would authorize their content on the service before October 1st.”

It took less than 24 hours for the “historically progressive and generous company” to respond via Twitter, and it didn’t wait until morning to make its announcement. Eddy Cue, Apple’s senior vice president of Internet Software and Services, personally called Swift to deliver the news before tweeting at 11:29 p.m., “#AppleMusic will pay artists for streaming, even during customers’ free trial period.”

Cue followed up with a feel-good response a minute later: “We hear you @taylorswift13 and indie artists. Love, Apple.” Later, Cue said that the company will pay artists on a per stream basis during the free trial period, although Cue declined to say what the rate would be. Once the free introductory period is over, Apple Music will pay music owners 71.5 percent of Apple Music’s overall subscription revenue in the United States.

Swift tweeted her response and addressed it to her fans and supporters: “I am elated and relieved. Thank you for your words of support today. They listened to us.”

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Swift’s crusade on social media showed the increasing weight that collective opinions on Twitter, Instagram and Facebook can have to force a change in corporate policy and direction. In a comic echo of that power, BuzzFeed promptly put together a list of 18 more issues Swift could fix through the power of social media, ranging from the battery life of iPhones to the size of Pringles cans.

Apple Music is launching on June 30, offering users a free, three-month subscription period. After that, the service will charge $9.99 a month for individuals and $14.99 a month for families with up to six members.