I'm not the owners, but:
https://en.wikipedia.org/wiki/Dost_test#Criteria
>In order to better determine whether a visual depiction of a minor constitutes a "lascivious exhibition of the genitals or pubic area" under 18 U.S.C. § 2256(2)(B), the court developed six criteria. Not all of the criteria need to be met, nor are other criteria necessarily excluded in this test.[1][2]
> Whether the focal point of the visual depiction is on the child's genitalia or pubic area.
> Whether the setting of the visual depiction is sexually suggestive, i.e., in a place or pose generally associated with sexual activity.
> Whether the child is depicted in an unnatural pose, or in inappropriate attire, considering the age of the child.
> Whether the child is fully or partially clothed, or nude.
> Whether the visual depiction suggests sexual coyness or a willingness to engage in sexual activity.
> Whether the visual depiction is intended or designed to elicit a sexual response in the viewer.


As long as this server in in the USA, that law should apply. Whether the owners want to host it at their risk, is upto them.