You can install our site as a web app on your iOS device by utilizing the Add to Home Screen feature in Safari. Please see this thread for more details on this.
Note: This feature may not be available in some browsers.
I could see where slack might take some of the chatter of the main investor thread. But I see a couple of potential problems too. Since it'd be invite-only it could easily be an echo chamber. To address that it'd be a good idea to invite some skeptics and even shorts who happen to wear reasonableness pants.
Probably the less reasonable shorts would still troll the main thread, because they want their posts and replies in a public place for maximum value.