My guess would be that they want you to share the article but not to leave their site for some other just to see the discussion. Or maybe it's just how the widg

My guess would be that they want you to share the article but not to leave their site for some other just to see the discussion. Or maybe it's just how the widget was implemented and no one gave it much of a thought. It would be a cool browser addon or maybe a service that tracks articles online and shows you comments about it from other sites.