Why the Best Companies and Developers Give Away Almost Everything They Do

The article fails to mention that for many of these companies, selling software is not their business model. Their USP comes from the large piles of data they have, and the network effect of their product that ensures a lock in.

I'd be more interested in companies which sell software to end consumers/developers and open source it at the same time. Red Hat is one of the few which has done that successfully.