Eric S. Raymond on GPL and BSD licenses. & Microsoft coming to Linux

[Frits van Bommel]

Jérôme M. Berger wrote:
>> Now, how would you make money on free, as in libre, software?  How would
>> you make a free, single-player RPG and still stay in business?  All you
>> can under GPL is take payment for distribution, as long as nobody else
>> starts to distribute it for free.  This means giving your hard work for
>> free, as in gratis, not business.
> 
> 	Ask RedHat, or any of the increasingly large number of companies
> that *do* make money on free, as in libre, software. Basically, you
> make your customers pay for specific developments and
> customizations. Once the software is released you still get paid for
> tech support and maintenance.

And then, of course, there are the library developers that release their 
work as GPL, but sell commercial licenses to those who want to use it 
without GPL restrictions.
Of course, one could argue they don't make money on the free (as in 
both) software, but on the non-free version of it (which may have 
identical code).