Maybe at some point whoever is behind hnnotify will decide they don't want to pay a huge Sendgrid/Mailgun/whatever bill anymore and shut it down. There's also

Maybe at some point whoever is behind hnnotify will decide they don't want to pay a huge Sendgrid/Mailgun/whatever bill anymore and shut it down. There's also the simple problem of discoverability. I never knew about hnnotify until now, since it's not part of the main site.