Muselk is starting his first YouTube livestream today (January 13th) with a 12-hour charity to address the Australia bushfire crisis, while Valkyrae kicks off things on January 14th. The terms of the deals weren't made public.

YouTube's livestreaming is still relatively small compared to Twitch. It's growing quickly, though. Also, streamers who've jumped ship from Twitch aren't usually worried about losing viewers, many of whom are likely to follow. Rather, they're more interested in both money (it's not uncommon for companies to pay for these exclusives) and the potential for greater flexibility to grow their brands. What streamers lose in the short term they might easily gain back by improving their quality of life and increasing their exposure.