1. Open source is about the code belonging to the community
2. Open source projects can not survive without funding - as you develop
3. So, both (open source and company) can be compatible if and only if funding belong to the community. In other world, if the open source company is decentralised and democratic. And that is what we need to fight for.
That's the legal reality of it, but I think what the GP meant was that the idea is that code effectively belongs to the communes (of course, credit is still due). It doesn't matter if this is done by licensing or releasing into the public domain. That's just the means to an end.
1. Open source is about the code belonging to the community
2. Open source projects can not survive without funding - as you develop
3. So, both (open source and company) can be compatible if and only if funding belong to the community. In other world, if the open source company is decentralised and democratic. And that is what we need to fight for.