I'm less worried about how many I'm subscribed to. It's a list I control and need to manage, so knowing that number is ok, even necessary I think. It's also a known quantity, it's a single list that my key controls. Even better would be multiple lists.

How many are subscribed to me is different. It's not under my control, and isn't really known. It's just a count it how many others subscriber lists have been seen that have my npub in them.