I am in now way saying you should open source the tool and not be able to monetize it. I simply wish for some way to access the source with purchase, even in a non redistributable limited license manner. I would be more than willing to sign any NDA or pay an extra fee or something, just because it would make my life easier, but if this is not possible, I understand completely.
I would also like to stress I am in no way ungrateful for all the work you do on raylib. It is a wonderful technology. I am using it now and appreciate everything you do. I have already purchased this software and completely understand any limitations you have to impose to insure your ability to make money. The fact you even offer the software for free as use as a web app is commendable from the outset, I have no issues paying you something for a small part of all the work you have done, and the existence of raylib brings me great joy in not having to re-implement many things when I create projects that I do not desire to use giant monolithic engines with. Thanks for everything you do Ray.