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I just checked out this page of their(https://github.com/simplex-chat/simplex-chat/blob/stable/README.md). Here's some info:
You must:
  • be polite to other users
  • avoid spam (too frequent messages, even if they are relevant)
  • avoid any personal attacks or hostility.
  • avoid sharing any content that is not relevant to the above (that includes, but is not limited to, discussing politics or any aspects of society other than privacy, security, technology and communications, sharing any content that may be found offensive by other users, etc.).
Messages not following these rules will be deleted, the right to send messages may be revoked, and the access to the new members to the group may be temporarily restricted, to prevent re-joining under a different name - our imperfect group moderation does not have a better solution at the moment.
I wonder how this could be accomplished. Maybe by having a fee (in sats) to post on the forums? At least it might slow down the spam.
Or have some kind of muting service? A person (or bot) who determines who's a valuable contributor, vs who's just trolling. Then people could subscribe to that service.
All possible with sats...