I wrote about this for the Observer a while back: http://observer.com/2015/06/you-too-can-build-a-business-on-...

1) They can encourage innovation in house by letting their own engineers share in licensing fees 2) They give a lot of stuff away 3) They go out of their way to get people to use their inventions in ways that are good for everyone concerned.

I'm a little rusty on the topic since this was a few months ago, but they made a pretty good argument that their measured approach is in the public interest.