Sorry that happened to you :(  And sorry to see you leave the galleries :(

Aiko is one of those figures where  her face can look anything between preteen to adult.  Unfortunately many morphs for Aiko tend to make her face look very young and child-like. And when people look at a figure (human or 3D), it's the face we  primarily use to  determine whether someone is underage or not.

While the body may look adult, if the face  looks like a child's face (and many Aiko morphs do), that image is considered "child" by the site staff, regardless of what the body looks like. It's the big eyes and round face that gives that perception. And unfortunately some merchants really play up those features when creating characters for Aiko.

Months and months ago certain figures were deemed "child" by Renderosity and as a result none of those figures could be used in erotic, nude or semi nude images. Aiko had been in that category initially.  However, Aiko is an animi character and was created to be an "adult", and after much protesting Aiko was removed from the list and images of her were decided on a case by case basis depending on the setting, her facial age, body type etc. *It's very subjective. * Given the problems that many have with child nudity violations when using Aiko, I'm almost sorry that she was removed from the "child" category. 

I know that while some really do see that the Aiko character  they created looks 12 years old when they upload their naked Aiko image, that some really do feel that the characer in their image is "old enough" to be considered adult.

Unfortunately it's not our own perception of the character that matters:  the decision ultimately rests with what the site staff  think of the age of the character and the "facial age/appearance" is a big deciding factor in those decisions.

I hope one day you reconsider your decision and bring your images back to the gallery here :)

"It is good to see ourselves as others see us. Try as we may, we are never
able to know ourselves fully as we are, especially the evil side of us.
This we can do only if we are not angry with our critics but will take in good
heart whatever they might have to say." - Ghandi