> Because they make big money with his work and he does not. They don't make big money with his work. They make big money with their own work, and he delivered

> Because they make big money with his work and he does not. They don't make big money with his work. They make big money with their own work, and he delivered a very tiny gear in that. It's not like he made some genious unreplaceable part which is worth billions on it's own. It just happend to be there and fullfil a demand they had. They can acknowledge it and give him something extra, or just follow the lizense and mention what's neccessary. It's up to them and how much value his work has for them.