By accepting these terms, you acknowledge and agree that you do not own or have any proprietary rights in the Game or any Mods you create, except as specifically mentioned here. Any Mods you create are your property only if they consist only of your original creative work. To the extent that any element of your Mod includes or is derived from the Game’s intellectual property (such as code, themes, characters, names, stories, dialogue, locations, artwork, sounds, music, and visual effects), you agree that all intellectual property rights therein, whether they are registered or not, are owned by Larian Studios and its licensors.
I’m not sure I believe you about your first point.
Which games on GOG do you think have DRM? GOG’s whole deal is they sell DRM-free games.