Use comment magnets: controversial-however-respectful questions, either/or choices, “cost this” prompts
https://damienqbav205.iamarrows.com/7-proven-ways-to-get-more-x-comments-growth-hacks-and-the-best-twitter-comments-service-picks
Use remark magnets: debatable-yet-respectful questions, both/or preferences, “fee this” prompts, and micro-case experiences. Make it straight forward to reply in one line, yet meaningful adequate to discuss.