You can still sell exclusive usage rights even if you cannot transfer ownership.
That's the idea behind German 'Urheberrecht' (literally creator's rights): As soon as you create something of sufficient originality, you gain moral rights that cannot be transferred except through inheritance (ie after death).
That's the idea behind German 'Urheberrecht' (literally creator's rights): As soon as you create something of sufficient originality, you gain moral rights that cannot be transferred except through inheritance (ie after death).