One of the strengths of the GPL is that companies don't like it for some reason. Since they don't like it, you can offer to sell them different licensing terms.

One of the strengths of the GPL is that companies don't like it for some reason. Since they don't like it, you can offer to sell them different licensing terms. That is what the damages are. It's not $0, it's all the money you missed out on from not being able to license your project.