If that is teh case can't I download it compile it and then I have CFS3.
Still I think it is cheap that they are charging. If it was a donation for bandwidth like happened on subsim for the SHII mods etc fine but this sounds like a chance to make a profit.
Like I said, not 100% sure about the source code thingy. And yes, I have to say again, charging from it at this point is cheap-ish.