You can run a secret or closed invite group using SLACK. Here's what I found https://steemit.com/steemslack/@cryptogee/join-the-steemit-secret-club-get-some-slack
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You can run a secret or closed invite group using SLACK. Here's what I found https://steemit.com/steemslack/@cryptogee/join-the-steemit-secret-club-get-some-slack
Just read through it not sure if it would be beneficial