Kuzuha starts a business to promote other vtubers with superchat. This is a real scummy move as he exploit this already struggling indie with his promise of fame if they send him akasupa. Not only that this is illegal as per Youtube ToS.
Kuzuha called it "direct marketing." Starts around 1:35:27 mark. This is considered "False Engagement."
The stream in question:
https://www.youtube.com/watch?v=PCAOl2VNr0I&t=5907s This is what he said:
葛葉「普通のスパチャは金額じゃないんで…売名は金額ですけどねぇ!売名はそりゃもう高ければ高いほどやっぱ…赤って見やすいなァーw」
Youtube Terms of Service 10-a:
use the Service to (a) sell any advertising, sponsorships, or promotions placed on, around, or within the Service or Content, other than those allowed in the Advertising on YouTube policies (such as compliant product placements)
https://www.youtube.com/static?template=terms 