I can't help but wonder how much the open sourcing of Stable Diffusion contributed to the decision to do this release.
There's some questions I have about this release
the interest is in the model itself. They released the pre-trained model as a zip that you can download from their website but they do not mention the license for using this model anywhere. It is unclear from the documentation and license under what conditions you're allowed to use it. The zipfile itself doesn't contain any terms of use inside.
Though they give instructions on how to tweak the model with your own additional input images; again it's unclear from the license if you can create derivatives of the Model.
One might assume it falls under the Apache license that's included in the repository. But the model itself does not live in the repository (is not bundled with the source code) so it's not clear. Also Apache isn't really suited for assets and models. it's more meant for source code.
It would be nice if they would adopt a license that explicitly mentions how the model can be used like StableDiffusion does.