This isn't a chat. It's a message thread on an forum. Messages are not realtime like a chat unless people are logged in an watching for updates. In general usage a forum is asynchronous.
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There is a chat function in groups.io but it just confuses people, in my experience, because people tend not to be logged in and watching for chat messages.?
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There are also groups.io features for member directory, photos, polls, files, calendar, database, wiki.
