Board Thread:Off-Topic Discussion/@comment-6433273-20180322113157/@comment-7882956-20180430131330

There could also be issues with the way the companies would like the characters to be portrayed. At least they're not super restricted like Haiyi is (even if she's not a Vocaloid, shes's still only restricted to Quadimension members), but I'm guessing the applications would basically weed out folks who have little to no music experience, producers who write about controversial subjects, or want them for the sake of having them. But then again, both of them were started to be Business-to-Business vocals, so it was likely they were going to be private anyways... interestingly, it was never clarified til now?

But I think the biggest contributor is the issues with Ren Li. But anyways, we won't know for sure unless someone spills the beans, which I highly doubt Wangcheng would ever admit it if the problem was coming from their own leader.