Pro Sites + MarketPress + Membership + Affiliates + BuddyPress + bbPress

I was hoping that these would all work out together. I wanted MarketPress and Membership to be premium plugins but I noticed that in membership there is a option for BuddyPress features. I was wondering if that would be available on all sites off the main site. If so, I wouldn't want other site having access to Membership because BuddyPress is part of the main site. So, could someone explain how all this can work together. I don't want other sites being able to restrict BuddyPress.