Apparently Stewart Butterfield, one of the co-founders of Flickr was a philosophy major. He got his BA in philosophy from the University of Victoria and an MA from Cambridge. Did philosophy make a difference? Hard to tell, but he gives a talk on How to Make a Fortune with your Liberal Arts Degree according to the Lavin Agency that represents him. The site quotes him to the effect, “You can always pick up how to figure out profit and loss, but it’s harder to pick up the other stuff on the fly.”
His co-founder and partner Caterina Fake, now working on Hunch, studied English and has a thoughtful blog here.
Just goes to show how useful the humanities are.