Use remark magnets: debatable-but-respectful questions, both/or alternatives, “cost this” activates
https://andyitra784.image-perth.org/7-proven-ways-to-get-more-x-comments-using-engaging-content-and-buy-real-x-comments-wisely
Use comment magnets: controversial-yet-respectful questions, both/or offerings, “cost this” activates, and micro-case reports. Make it convenient to answer in one line, however significant adequate to debate.