> Like if I worked for Ubisoft I'd have time to do 3D design for free for some other company.

Why is that so hard to believe? It's like suggesting that no professional software engineer would ever contribute code for free into an open source project in their free time. My basic assumption if somebody send a patch to an open source project is not that I'm being social engineered -- it is that they're either using the software or interested in the domain.