I even tried signing up with 2 different email addresses and I still haven't received any alerts.

No one does. It's out of commision, at present.

I even tried signing up with 2 different email addresses and I still haven't received any alerts.

It is not presently working because people would sign up with fake addresses and a million e-mail would bounce back to us as underliverable. Hopefull it will work again one day.