Most closed-source products have very different management styles than open-source products. If you're interested in the topic, check out the book "The Cathedr

Most closed-source products have very different management styles than open-source products. If you're interested in the topic, check out the book "The Cathedral and the Bazaar" - it talks at length about the different styles of building products (Cathedral generally being closed-source stuff, while Bazaar is generally open-source)