I cant find even one gallery of
www.youngporn.net on TGF wesbite.
But there are simple rules regarding the CP online.
If you are running a sponsorship program you have to keep the records of your models.
There will be many entities who will ask for that especcially in teen niche.
If you are running a free wesbite and your content based on promotional content of sponsor programs ,
then to protect yourself promote only those websites which have the records link on the splash/tour pages of the site.
If the site using well known billing company almost sure they have already asked for the letter from the company lawyers which confirms the legal age.
If the wesbite you promote dont have such link and you cant get the link from them, then stop promote it.It is illegal.