> “Game Engine Product” shall mean software used for video game development. This includes both the content authoring software and the software used to show the created content.

The license allows redistribution so long as:

> a) You do not sell or otherwise commercialise the Work or Derivative Works as a Game Engine Product; and

So my read is that any tool that allows you to modify game content constitutes a game engine product and they specifically do not allow you to sell a game engine product built with Defold.

This weird technicality that is invented in this discussion about whether or not you're using Defold's built-in engine tools, or developing your own tools on top of Defold is entirely irrelevant to the language of the license.

Modding a game engine’s editing tools to the point where they are user friendly enough for your players is almost always a bigger challenge than building basic editing tools using the engine.

This entire argument is insane to me. Someone is releasing something for free with the caveat that you can’t use it for this one specific very uncommon thing. Then people are up in arms “what if one day I want to do this one specific thing? Do you? No but what if I did?” Don’t use Defold.

    You do not sell or otherwise commercialise the Work or Derivative Works as a Game Engine Product.

    "Work" shall mean the work of authorship, whether in Source or Object form,
    made available under the License, as indicated by a copyright notice that is
    included in or attached to the work

    "Derivative Works" shall mean any work, whether in Source or Object form, that
    is based on (or derived from) the Work and for which the editorial revisions,
    annotations, elaborations, or other modifications represent, as a whole, an
    original work of authorship. For the purposes of this License, Derivative Works
    shall not include works that remain
    separable from, or merely link (or bind by name) to the interfaces of, the Work
    and Derivative Works thereof.

(so if the extension API is missing something, contribute the feature(s) you need back to core, then you can write your extension free of issues, so far as I can tell)