From what we can see, the comments section is entirely hidden for all paid posts unless a user is logged in and paid. We believe this massively limits the likelihood of anyone leaving a comment and participating, as they are unable to see the existence of a comments section without logging in and being a paid member.
Appreciate any workaround suggestions until Ghost can implement this one day (fingers crossed). We were thinking about replicating a “fake” blurred out comment section that logged out and free members can see so they are aware of the existence of the comment feature.