There is not a lot of traffic on the handful of plugins I maintain, but from time to time a user posts a comment on the plugin Comments.
The problem is that - as the author/maintainer --- I do not receive a notification that a new comment has been posted. The only way to keep informed is to visit that Comments page regularly.
Then, what is the point of the Unsubscribe from comments link at the bottom of the page?
Strangely, Subscribe and Unsubscribe links are identical, as for example: https://moodle.org/plugins/subscribe.php?type=comment&pluginid=120