This website contains age-restricted materials including nudity and explicit depictions of sexual activity.
By entering, you affirm that you are at least 18 years of age or the age of majority in the jurisdiction you are accessing the website from and you consent to viewing sexually explicit content.
They don’t need to republish the 60 million questions, they just have to credit the authors, which are surely way fewer (but IANAL)
Maybe that could be just a link to the user page, but otherwise I would see it as needing to link to each message or comment they used.