Ummm...I have 591 subscriptions -- and it's not that long since I dumped a WHOLE LOT.
I don't have email notification on them, because that clutters my inbox like crazy, but I do like to be able to click on "User CP" and see where there's been recent traffic. Especially good, if I'm on a quick check-in, and don't want to get sidetracked. But I guess it's time I did some more weeding!