Okay, this is a little embarrassing because I know this is totally a newbie question; yet I have seen conflicting answers to this given in different places, and I need to get this straight:
On a BuddyPress install with Network Multi-Site enabled, are all BuddyPress members also Subscriber members (or whatever the network admin chose as the default in Network Settings) of *all* the blogs created by members on the network? And if that's true, if the "Allow site administrators to add new users to their site via the Users ? Add New page" button is checked in Network Settings, does that allow member blogs to have their own members *in addition to* the main BuddyPress members, or *in place* of them?
Please forgive my ignorance. My thanks in advance --