Former CS：GO pro Michael "Shroud" Grzsesiek had become one of Twitch's biggest superstars. But now he has leave the platform, following another Star Steamer, Ninja and jioning the Microsoft's Mixer. "Same Shroud. New home." The streamer said on twitter.

"The move to Mixer allows me to focus on what I love: gaming," Shroud told CNN Business on Thursday, "It allows me to focus on livestreaming for my fans and directly engage with more interactivity and variety."

Shroud's move also demonstrates Microsoft's willingness to buy up more content creators. And if one or two of them boost numbers significantly, adding more could increase Mixer's competitiveness against Twitch, analysts speculate.

"Shroud's move to Mixer tells you exactly how serious Microsoft is about owning relevant talent and content creators in ramping up its games business," said Joost van Dreunen, managing director at SuperData, a Nielsen company that analyzes the video game industry.