BuddyPress.org

There isn’t any configuration option to do what you want. You’ll have to customize wpmu or use a plugin if such a thing exists. Try searching the wpmu forums https://mu.wordpress.org/forums/ or over at

[SNIP] cancel all that.

As I was getting the url for wpmudev.org and their plugins area the front page has this:

http://wpmudev.org/project/default-user-role

This seems to set the default user role for new blog owners. Go figure.

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