I have to agree on the no fine-grained control. My point was that it is easy to opt out of the notifications by email in general. I'm positive that there is an

I have to agree on the no fine-grained control. My point was that it is easy to opt out of the notifications by email in general. I'm positive that there is an option where you receive a notification when someone send you a message, but I don't think it is possible to get event invitation notifications only.