Mayu is lucky she has any ads at all. If anything, Kojima should be the one to have those ads considering she won best libero for Asia and VNL but she has no pull and her overall brand value is severely lacking.
but mayu is an official ace and she's playing in italy i mean its not even a question that she should be getting her solo stuff. it would not look good for the women's team if even their most popular member couldnt bag any deals when some of the local hypegirls like rana shiraiwa getting offered something.
kojima is not an ace so its really up to whether or not there is a demand as in if they see her having some kind of influence with volleyball community and the youth which unfortunately she doesn't. the women's team in general doesnt have the influence on the general public because if they did some of them would have reached a million followers already that's why brands are targeting the influencer types like ran who milks his fans utilizing all types of social media. his online presence is huge and that alone is bankable enough
airi also had that capsule collection deal with descente but it seems only for that collection in particular since we're not seeing any new promos that has her in it.