Because Google offers Android for free, including the sourcecode, it makes Google look like a saint, or a company of higher moral standard than Apple or Microsoft.
Its MxR Lab has just launched a showcase of creations and modifications that DIY enthusiasts can build, including open sourcecode for both the devices and integrating full-body motion control through Kinect for Windows or OpenNI.
Companies are trying to save money and increase innovation by integrating third party code, including free open sourcecode, into their software supply chain.