I came here wanting to say the same thing. It's a lot like Amazon emailing customers periodically to review recent purchases and making it really easy to do it.

I came here wanting to say the same thing. It's a lot like Amazon emailing customers periodically to review recent purchases and making it really easy to do it. I pretty often do that and it works! It doesn't feel annoying either because it isn't in my way. The key is catching the user when they aren't completing a specific task. People often check email to pass time, which is perfect for this.