As far as I can tell from Emad's discord and twitter discussion, the idea appears to be to make this a "research" release, and therefore the worse license.
At a later point the model will be renamed "StableIf", and released with a similar license to StableDiffusion.
Yeah Emad was clarifying this on the LAION discord the other day — plan is to have a better-licensed version out Eventually™, guess we'll see how long that takes.
At a later point the model will be renamed "StableIf", and released with a similar license to StableDiffusion.