During commenting article, now it's possible to submit email address. If submitted it will be used to inform visitor when someone else comments same news article. Beside article title and new comment email also contains link to actual article and un-subscribe link, which, if followed will remove visitor from this "mini mailing list".
This way of commenting articles can enlarge number of site visits, because every new comment poteicionally brings back all visitors that already commented that article (and leaved their email addresses).
