The email notifier always sends the notification with the same exact subject line. As a result, Gmail bundles them all together as the same "conversation".

So after only a few days being subscribed to some tag set, I get this in my inbox:

![Alt text](https://i.stack.imgur.com/WVidu.png)

Since I have a filter to label such messages and skip the inbox, and since I (like many users) don't delete messages but archive them, the end result is a [DoS attack](https://en.wikipedia.org/wiki/Denial-of-service_attack) on my Gmail :)

![Alt text](https://i.stack.imgur.com/WjzER.png)

It's 14 by now, but it will probably grow very big very soon.

The easy fix is to add a date to the subject line.