Why didn't OpenAI release the "Unicorn" version of its AI storytelling software?

GPT-2 is OpenAI's language model that produces astonishingly lucid text responses to short text inputs. I've been playing around with a small model of GPT-2 (here are installation instructions) for a while and am shocked by the quality of many of its responses. The language model is probabilistic, too, so it gives a new output every time you enter the same prompt. For example, I fed it with this fake news prompt:

Food scientists have developed a process to turn people who have died from ebola into delicious food. The disease victims' bodies are freeze dried, then ground into fine powder and mixed with salt and spices. "Tastes like chicken," say taste testers. The first batch of Ebola Bowls will be released on a limited basis at Whole Foods stores by Thanksgiving.

Here are five outputs from the above prompt:

GPT-2 OUTPUT (1): The bowl is made from raw chicken and other animals, which are ground and cooked in water to release oil and protein. This is the best way to cook the human body, says Dr. John D'Agostino, who led the study and now works for the Food and Drug Administration (FDA).

The researchers believe that the Ebola bite is the most common way that people develop Ebola and that some people may carry the virus to other parts of the body. The virus can spread from person to person by contact with bodily fluids.

The study was published in the journal Infectious Diseases. Other scientists are still studying the safety and efficacy of the meal.