Yesterday I noticed that my Curse client had changed icons, and it looked weirdly like the Twitch icon. Scratching my head (I hadn't installed anything) come to find out apparently they bought out Curse.
http://www.businessinsider.com/amazon-owned-twitch-buys-curse-2016-8
http://www.businessinsider.com/amazon-owned-twitch-buys-curse-2016-8