[vdr] GPL Licensing?

I don't know the proper rules and all, but I didn't think it was legal to sell something that was Open Source or GPL as what VDR is? I don't know how all of the authors of all the VDR Plugins and Klaus himself feel about others making money off of their hard work, and I hate to see things change. But thought people should be aware there are a couple of people out there trying to make money off of your work. Someone is selling a VDR Live CD, there is a thread about it on dvbn.happysat.org Just wanted to let you guys know. I hope that a stop is put to that, cuz I think that is just wrong.

Thanks to all that help make this software what it is.