There has been no details given out for when OBS will be released site wide as yet. But when OBS is released site wide, an announcement will be made on the Chaturbate Blog:
UPDATE:
Chaturbate have now announced that they are rolling out OBS to all broadcasters:
We are currently rolling out support of this feature across Chaturbate to age verified broadcasters. All broadcasters in North America will be enabled soon, followed by Europe, and then globally.
https://support.chaturbate.com/customer/en/portal/articles/2831439-external-encoders-and-obs
CBRules 