Gamer Tyler "Ninja" Blevins high-fives fans as he arrives to the Epic Games Fortnite E3 Tournament at the Banc of California Stadium on June 12, 2018, in Los Angeles, California.

Tyler "Ninja" Blevins, a gaming star who has earned millions streaming video of himself playing Fortnite, said Thursday that he's moving from Amazon's Twitch streaming service to Microsoft's Mixer service.

The announcement is a win for Microsoft, which bought the Beam service that became Mixer in 2016. Mixer has remained in the shadow of Twitch, as well as Google's YouTube for live streaming of game play, according to streaming app Streamlabs, which cited data from Newzoo. Gaming represents about 10% of Microsoft's revenue, and the company has been investing more in the category, with plans for a cloud-based game streaming service that will compete with Google's upcoming Stadia, among other offerings.

Ninja announced the news on Twitter.

tweet

He's the most popular streamer on Twitch, and he earns more than $500,000 each month while streaming Fortnite, CNBC has reported. Fortnite was the most watched game on Twitch in the second quarter, according to the Newzoo data.

"Xbox Live now has 57 million monthly active users and Mixer usage growth is accelerating," Microsoft CEO Satya Nadella said on the company's earnings call in October. "This loyal, high-value community is our strongest asset, creating expanding opportunity for monetization of first- and third-party games. Fortnite is a good example of that, and all up, we are seeing record software and services revenue and engagement being driven on our platform."

Ninja has been at the center of controversy before. In 2018 he defended his decision to not stream game play alongside women, Variety reported. Microsoft recently made it easier for people to report abuse while watching streams on Mixer, and additional tools to prevent harassment are on the way.

Some other Twitch streamers objected after Twitch started displaying ads for a special stream from Ninja on their streams, as Variety reported. On Thursday the Mixer homepage featured a prominent announcement about Ninja's arrival. "For a limited time, subscribe to Ninja's channel for free!" it said.

WATCH: This 26-year-old is making $500,000 a month playing video games