I think this might require a separate law to be meaningfully enforceable since you really want people to be directly liable for the lack of release, rather than having defendants claim "nobody ever reads the ToS or has a release".
At the very least it would probably require very clear messaging from OFs that this is required, such that basically everyone on the platform actually has/is able to produce it.
NSFW - https://www.gettyimages.com.au/search/2/image?phrase=nude%20...
Requiring this level of sustained abuse to prosecute people is obviously bad, so I am entirely open to the idea that more should be done here to prevent this abuse, but it seems like these people were prosecuted beyond a reasonable doubt despite having some sort of releases.