Idol basically started hard pumping ads and promotion for their EN branch but the people that benefited the most from this were these guys:
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I think their ad campaign was way more aggressive than anything I have ever seen. And it shows with their numbers. Not saying that they are bad or anything but clearly ads are more important than content. You can be the most talented Vtuber and if no one knows about you, you wont get views. Maybe you get lucky but its highly improbable.