Is it worth the effort for any individual poster though? The unreachable segment (read only, doesn't comment) which already makes up the vast majority of audience is practically un-engageable. Among commenters, there's the blend of low-effort 'this'-type posts, soliloquizers (though possible therapeutic for the poster), and lizardman-constant/flame type reactions. It seems that in most venues, the effort to read through all comments and find anything valuable to engage with has a low social ROI.