I don't think that if an artist makes soemthing for FREE that he HAS to allow others to use it comercially. The artist is giving it away free out of their love for the community, there's absolutely no reason whatsoever that they should do that hard work for free and that others can then profit from it. If they are selling the product, then that's their compensation... but otherwise, I feel it is up to the artist who made it to decide. If I was releasing a freebie, and worked hard on it (as I had a bunch of them some time ago at 3D-CC), I would be outraged if I had spent my time and energy making soemthing FREE for the community and then saw someone else turning a profit for my hard work while I sat there getting the shaft.