The most common reason people don't share every avatar that an outfit supports is because buying the outfit for just the avatar they use can be a lot cheaper, a lot of times it's under half the price of the full set; They're buying it for themselves, and they're generous enough to share it with us here. There are also a few ways to convert an outfit from one avatar to another such as Mochi Fitter, but sometimes it isn't perfect, especially when converting to or from Milltina.
