That wondered me too: I searched also here in the forum and
the oldest thread I found was from november 2015. The content was removed by a moderator, so it's not completely clear what exactly this topic was about. It was also
closed since the moderator said "it was extensively discussed in the past". According to
this post, the site was only until around may 2023? While a lot of people just here knows that they're involved in illegal things since at least 2015?
I had a look in the diapers sub forum, it has
1142 pages, starting at January 2015. Since it must be before november 2015, I looked around those threads from the last one back to
page 1078 where the thread above was posted. I looked at the titles, opened some threads with less speaking names like "question" or similar, but found nothing more regarding this topic. Using the search, I found another topic, where tiger underwear was posted and
someone explained that they're involved in kids models and trouble with photos. Hard to find more, since there are no topics mention exactly star diapers. And searching through posts leads to a massive amount of other completely unrelated stuff, where people talking about things like star motives on a diaper.
Seems like an interesting idea for an education/documentation post, but what I still got seems too thin to accuse them in good conscience for being a child porn content creator, since there seems nearly no evidence than having young boys on their advertise pictures, where we don't even know for sure if they're teens or kids. On Pornhub for comparison, we have a research of the New York Times contacting victims, checking their stories, people investigating if the site doesn't care to take down illegal content like underaged or reverse porn and much more. So it's proved that PH did not enough and instead misused the illegal content from the victims to earn more money.