▲ ▼ On-demand Hacker News notification
Every now and then a service announcing notification for Hacker News pops up which takes in email id, username and send email for HN replies. Then there are browser add-ons which send notifications when there are new comments to subscribed HN threads.
But, as far as I have searched there is no service which allows me to subscribe to specific threads and comments for notifications without having to give in my email id.
I think there would be takers for such a service, including myself as HN crowd are generally averse to mandatory email id and many would like to follow interesting threads, comments including ones which they have replied to.