I think because there's no way to differentiate someone who's a learner vs someone who already has lots of experience. They'd basically be giving it away for fr

I think because there's no way to differentiate someone who's a learner vs someone who already has lots of experience. They'd basically be giving it away for free to everyone. Another option would be to license it "free for non-commercial use", although then you have the problem of people using it for commercial use without upgrading.