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This is helpful and I agree. You forgot Slack and IRC!
I propose this breakdown of the basic software paradigms:
- forum (Usenet, PHPBB, Reddit, YouTube, Discourse)
- blog (Wordpress, Substack)
- microblog (Twitter, Mastodon)
- chatroom (IRC, Slack, Mattermost, Clubhouse if you count audio)
God I hate it when people say “check my Substack”. It’s a blog dammit.
How about doing it after a certain period has elapsed? A week, or 30 days, say.
This would approximate the freemium model where early access is paid and archives are free.
It might make it easier to get creators on board.