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It says 15.

We've only hit this limit with very large all-hands meetings or presentations that lots of people also want to dial into. We often have a separate view-only stream for those cases.

Webex and GoToMeeting handle all-hands type meetings by making it only a 1-way presentation (view-only as you said). Participants can only ask questions via a chat dialog. The nice thing is, it prevent stupid feedback loops you always get when someone forgets to mute themselves.

Though, I believe both Webex and GoToMeeting charge extra to have this ability.

> Join meetings with up to 15 participants

https://www.google.com/intl/en/chrome/business/solutions/for...

that's 15 streams, e.g, 15 meeting rooms