What happens when I the company create a databse (let's say facebook) and Developer A create more compelling application that facebook company? 1.Where is the

What happens when I the company create a databse (let's say facebook) and Developer A create more compelling application that facebook company? 1.Where is the controlling part. 2. what facebook internal advantage/motivation to create and hire more engineers and give dopemine to more people? Saying company facebook own coin which has no value what does this even mean? Explain to me.