What is the maximum number of users that can participate in a chat?

Since it becomes impossible to follow a chat with too many users participating at the same time there is a maximum ceiling of 1480 users per chat room. If your chat should exceed this artificial limit, the excess number of users will be placed in another room so the chat doesn't become difficult to read and keep up with.

If you're expecting over several thousand chat participants you might want to disable Chat and use Social Stream instead.