>>9990223This an excuse made up later.
1.Communication and contracts with the guests would have been done for a long time.
2.When the announcement of event was made Kson appeared on all 3 languages sites (now removed), and is still present on the NicoNico page.
3.Playism Bilibili streaming partner withdrew from the event because of Kson, leaving a statement on bilibili the one they claim in english tweet intern did. Playism responded by saying they are sorry they didn't know about her background.
Playism only removed Kson after the Chinese side backed off and complained.