Twitch has acquired game streaming service Curse, known for game modifications and add-ons, Curse Voice VOIP service, Gamepedia wikis (game guides), and other sites and services. Curse was originally founded in 2006 by Hubert Thieblot mainly because of his fascination of World of Warcraft.
According to Twitch, “As discussions with Curse progressed, we have gotten to know their exceptional team who shares our passion for gaming and are equally committed to supporting communities with an enriched, and more enjoyable experience. This acquisition will help provide gamers with the tools and resources they need to achieve the ultimate gaming experience, a mission shared by both Twitch and Curse.”
Curse has had some competition in the field of communication services for PC gamers such as TeamSpeak and Discord.
[Source]: Twitch Blog: Say hi to Curse, the newest member of the Twitch family.