When I say this, I have the feeling that most of Brilliant users agree. I don't like having everything hooked up to my email. It's very inconvenient, and furthermore, very spamming. I would really like to have a notifications tab on the black bar at the top of the page. The notifications could tell you about followers, comments, and even achievements (which is another thing I'm hoping for)! The achievements would be an incentive for users to try to accomplish goals, like solve 500 problems, post 20 solutions, etc.. Give feedback!