Think I remember a team member commenting somewhere that this would be possible but I may be wrong.

Would there be a way to export and save compositions as "non openable in the Vuo editor" ?

This could be great for people wanting to sell a composition and protect it.
People could want to sell them as effects for VJ softwares such as Coge and VDMX so the published ports should be accessible.

Or people could want to sell them as Vuo sub compositions too and therefore double-clicking them in the Vuo editor shouldn't open them.

Currently people could already sell a custom node, sell an exported app (don't know about Final Cut effects), a movie ...

I could imagine one could sell a closed and protected composition at a low price and a normal editable one for some bucks more.