Hi,
Interesting. I think I never checked my settings until now, but I do receive notifications.
Under my account settings following is ticket, please see attached screenshot.
One that matters to me is by default ticked I guess, b'cos I don't remember doing it : "Automatically subscribe me to all topics or reviews I participate in".
Could you verify yours with the attached screenshot.
It may just be a issue with your profile, Just raise a ticket with NetApp, someone will fix it.
Thanks!