[ganwar]

To be precise they are only releasing the already trained model. The associated dataset is not being made public.

Thus, it is meant to be for off the shelf use rather than being able to tinker with the network to produce nuanced results.

[mattthebaker]

Or they just don't want to be distributing gigabytes of porn... most of which is probably under copyright.

Making the data set available and whether you can tinker with or retrain it are very different things.