Pro Sites and Membership integration

HI! I've searched here and found several threads from over 6mths ago saying that these 2 plugins were going to have better integration added, but I can't find anything since. Has this happened?

What I'm trying to do is control access to Pro Sites using Membership. So on my multisite network on the main site I'm using Membership to control access to private forums, BuddyPress and premium content.

All members will sign up to a free membership - either public or business. Business members will then be given the option to upgrade their membership to a paid level that will include a Pro Site (blog + their own shop using MarketPress) and access to more private content and premium support.

So - should I charge using Membership that then could activate Pro Sites for their account?

Or, do I charge using Pro Sites?

Any guidance will be greatly appreciated. Thanks!