Originally training the model had used the energy resources of that original corporation or whatever. But when you download that model and start running it on your own hardware, you are using your own energy.

Think of it kind of like some software like Jellyfin. When the developers write the software, they do so using their own electricity. But when you download Jellyfin and actually run the software on your own hardware, you are now only using your electricity, not the developer’s electricity at all.