I'm not sure what you mean, sorry. I've seen email notifications, but to me they are just as bad as subscribing to a lot of sites by email. That's kind of what

I'm not sure what you mean, sorry. I've seen email notifications, but to me they are just as bad as subscribing to a lot of sites by email. That's kind of what RSS is for: aggregation. So yes, it means you don't have to click through sites, I accept that, but still not a good user experience. If you mean something else, let me know, I am interested. I don't know what you mean by splitting the user base or constructing a parallel comment system. I'm just talking about how to provide commenting, as a content publisher. RSS + on-site page by page commenting (even with email notifications) has a fraction of the engagement (in my anecdotal experience) of FB.