I am not against cooperation, I'm a Communist. What there isn't any evidence of is worker cooperatives like Mondragon being capable of working within systems owned by large megacorps and overpowering them and outscaling them. There's plenty of evidence for Socialism.

We are not bees, nor mushrooms, nor ants. FOSS is fantastic, and has many benefits, otherwise I would not be here. However, the idea that we can carve a cooperative niche out in a system dominated by Capital is Utopianism a la Saint-Simon, Fourier, Robert Owen, etc, and this Utopian model has been discredited for centuries.