Censored a bit, but not completely. I can get occasional boobs out of it, but sometimes it just gives the black output.
This gives you no info on how the model works. what is being applied is fal's post-inference "is this NSFW?" filter model So your censorship investigation (via boobs) is testing a completely different, unrelated, model.
(Also you can download the model itself to check the local behaviour without extra filters. Unfortunately I don't have time to do it right now, but I'd love to know)