I've heard about this in the form of "if you want to sell hardware, you have to give them the blueprints", and companies doing it because they want to do busine

I've heard about this in the form of "if you want to sell hardware, you have to give them the blueprints", and companies doing it because they want to do business there. I wouldn't be surprised if this included the source code of everything that ships with the device, but I'd think it doesn't extend to server-side code.