Some guy who either can't give up the straw man argument or still doesn't get it writes:
Just like a biker ends up carrying more or less the same weight -- whether as a bike or as a lock, the GIS system users end up paying, one way or another. They pay the software vendor if they choose a commercial platform, or they pay the implementer (in staff time or consultant fees) to glue together the pieces of the “free” solution.
And who exactly is arguing otherwise? Open source is about freedom, not about cost-free operation. How many times does this have to be said?