Money, obviously. This engine has a permissive license, MIT. The question is rather what one can conveniently do with it, in the context of the given game, whe

Money, obviously. This engine has a permissive license, MIT. The question is rather what one can conveniently do with it, in the context of the given game, when compared to a big-name engine. Possibly, for non-demanding games, smaller engines are a good tradeoff between performance/features and cost. Godot, for example, is free, but AFAIK it doesn't have a very efficient culling (yet)¹, so for smaller games, it may still be worth the savings. ¹=https://www.gdquest.com/tutorial/godot/3d/optimization-3d https://www.gdquest.com/tutorial/godot/3d/optimization-3d