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While Floyd Mayweather and Manny Pacquiao were duking it out on Saturday, another battle was going on in the background: Periscope versus illegal live-streams. Twitter-owned Periscope, which lets people stream live video from their smartphones, confirmed on Monday that it received 66 complaints from rights holders during the fight and took down 30 illegal streams because of them. The rest of the illegal broadcasts had finished before Periscope had a chance to deal with them. A company spokesperson told NBC News that it was "able to respond within minutes" to complaints. "Periscope operates in compliance with the Digital Millennium Copyright Act, we respect intellectual property rights and are working to ensure there are robust tools in place to respond expeditiously," the company said. "It’s not the kind of content we want to see in Periscope." This comes after Twitter CEO Dick Costolo raised some eyebrows by tweeting that Periscope was the "winner" of the Mayweather-Pacquiao contest. Periscope launched in March after its own rival, Meerkat, became the toast of South by Southwest. Now both have to deal with a busy sports season that includes the NBA and NHL playoffs and Major League Baseball.

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— Keith Wagstaff