>>10
Commercial redistribution is not only not disallowed by free software, it's encouraged.
Please, sell copies of my GPLv3 software. Sell support for it. Package it prettily. I'm just a programmer; I don't do advertising and PR. If you want to do that for me, be my guest. I'd also like a beer and maybe stock options, but if you don't want to give me that, I can just endorse your competitor that does.