Are those commercial ventures linking their code with the Git binary? Or are they just building tools which wrap the command-line Git tool? I'm inclined to thi

Are those commercial ventures linking their code with the Git binary? Or are they just building tools which wrap the command-line Git tool? I'm inclined to think that most (if not all) commercial offerings are going to use the second option, because there won't be much difference to the end-user and it means the company won't have to open-source their code. If Git was permissively-licensed, perhaps those companies would choose to link with the binary (or incorporate the code directly into their products) and contribute patches and bug-fixes back to the project.