> Open-source does not have to mean free of charge. I'm one that encourages paid courses if you can make them better than everything else available. Not the OP

> Open-source does not have to mean free of charge. I'm one that encourages paid courses if you can make them better than everything else available. Not the OP, but I suspect that the question wasn't really about paid courses per-se, but instead about proprietary courses (in practice the two do overlap quite a bit, which helps confuse the discussion).