If you come along a Dev willing to take it on keep this in mind. Another profile feed could be used for all subscription based material. Like we now have a separate 'Blog' and 'All Posts' feeds, another for subscription content would be perfect. That way you can showcase the best of the best for easier discovery and evergreening. This would be the feed potential subs would want access to.
Of course, many other platforms which are open sourced have these features, like Minds.com and Flote. It might be easier to incorporate than you think.