For those of us who design worlds and assets for others, it'd be really great if we had the option to privately sell assets and scenes to a specific individual. Right now, the only way for me build a world for someone else means I either have to post the world publicly on the market place, or I have to have the assets transferred to that person on the backend by contacting support (If I understand correctly). Even if I'm made the admin of the world, I can't give the owner of that world ownership of the assets I created for them.
With the growing demand for freelancing and world building, this would be a useful tool.