Its not that I have a problem with selling OSS software. My issue is with someone who is not actively involved in a project profitting off the work of those who are.
The way I see it is, Team A puts a lot of effort and pride into something they want to share with everyone. For whatever reason, Team A decides not to sell it or try to make money, they instead decide to let other people have it so that they can enjoy it too.
Person B comes in, recompiles project and than sell its to other people. And Team A doesn't get any of that money, or benefit in anyway from them doing so.
But I don't know, maybe I am to biased on this. I wrote a plugin for Notepad++ that lets you compare files, and all I can think about it is how shitty I'd feel if someone took my source recompiled it as Compare++ and started trying to charge people money for it. Even if whatever license I put it under allows such things, I still think its disrespectful.