I recently opened an issue on the openwrt forum, but I am not receiving notifications via email re responses. Some one responded a week ago, but I was not aware of it. (I don't keep tabs open on every open issue across many distros, packages, etc.)
I searched for a subscription list but the only thing I've seen is a blue icon indicating that I should be getting notifications for the issue. I checked my spam and trash folders, too, btw. If there is a configuration item somewhere I may have missed it. (I'm due for new eyeglasses soon...)
No, by default it will only notify you about activity in the threads you create, replies to your posts, @ mentions of your username. It can also notify for topics that you have manually set to follow and be notified.