Several people have alluded to this outreach elsewhere in the thread. I'd certainly believe it. Any links/references on what these companies have offered?
It's not secret, just not very well known.
As I said, you can usually find it in mountain view committee meeting minutes (for Google), cupertino council minutes (for Apple), etc.
This is done because otherwise, the towns get yelled at. Heavily. There are lots of interest groups involved in this kind of thing.