I will write down this story so you will be protected from this....if it will happen to you.
There was a company - I will not reveal YET its name - that wanted to use the Diagramo engine in commercial purposes.
I said ok as long as they will pay the money and I will be able to fuel the Diagramo with more power (host, design, etc).
They start using the sources and finish what they needed, I helped them as much as I could.
The result? The money never arrived.
This kind of story makes you wonder if it worth to help people or do anything for free.
The biggest issue is that actually steal your desire to do continue.
Be aware, very aware.