[javajosh]

Why would anyone be passionate about any specific corporation?

Speculating that it's perceived risk mitigation. If you're perceived as loyal, helpful, and even somewhat capable, they'll keep you around! This is in fact the perfect role for that person who gets a lot of juice out of supporting someone else achieve their goals. It is also probably a personality thing.

Of course, you have to answer a generalization of your own question: why be passionate about anything? It doesn't seem to be a necessary, or indeed very useful, to improve darwinian fitness.