You'll note that Duende correctly does not call their model open source. Is source available a step up from fully closed source? Sure. But it's not the same as

You'll note that Duende correctly does not call their model open source. Is source available a step up from fully closed source? Sure. But it's not the same as open source. So if your goal is to promote open source, I don't see why you would work with a product such as Duende, or ImageSharp if they hypothetically followed this example.