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Kirschtort Tweeted ( and deleted that tweet, saying he will explain the details tonight ) that he has decided not to join ApexFestival. My guess is when he told the organizers who he got for his 3rd member they told him to fuck off. (He was scrambling to find members, asking people on twitter to join, up until he announced Mikeneko). UUUM has connections with both Cover and Mafumafu, she is probably on their shitlist.
So in the end she suffered all the fallout of hurting her fans but got none of the exposure than comes with joining a big event.