Has Open Source Become A Marketing Slogan? - Forbes.com:

"What gives? Officials at VA Software say they can't release SourceForge Enterprise Edition as an open source program, because, if they did, copycats could create knockoffs of the program, and that would hurt sales."
...
This is the latest twist in the evolution of the free and open source (FOSS) movement. What began as a revolution has now become just another marketing slogan. Startups are latching onto the hype around “open source” to gain interest from venture capitalists and earn street credibility with the FOSS community, but then proceed with a business model predicated on making money by selling closed source code.