Comment by qdhqdhqdg

"Open-source" means nothing alone, what matters is the licence. For eg. Unreal Engine is "open-source" but under strict license. Defold engine is also "open-source" but has a Apache-modified custom licence preventing the commercialization of editor derived work (so no commercial custom editor), etc.

There are many degree of openness and Godot goes full MIT so Godot is truely yours (both the editor and the engine)