There are many, many companies selling Free Software. I personally worked five years for one, getting paid for writing A/LGPL licensed code. It's just that they're small companies working as a network, not behemoths, since the economics of sharing code favour that. And to me, that's just an extra plus, not an issue. But I'm sure Peter Levine partner at a16z doesn't like it - VCs are generally unable to extract profit from these companies.