[r-a-y]

@hachimaki

Instead of modifying all the BP templates, you could try the Registered Users Only 2 plugin:

https://wordpress.org/extend/plugins/registered-users-only-2/

I’ve made a few mods to that plugin to better support BP here:

https://buddypress.org/forums/topic/bp12-plugin-wishlists#post-42114

@nipponmonkey

Use what I suggested above.

Then turn off registration and manually create users. Assign these users a role of contributor or higher.