No, it's the other way around. Gura is the starter vtuber for Holo EN. Most people don't search for other vtubers because they only know and recognize Gura. When she streams, new people come, they watch until it's over, and then they watch another vtuber that gets recommended, which is most likely another EN member. When Gura doesn't stream, EN declines because they can't attract new viewers. This is the real reason for EN's decline for the past 12 months. Management has likely realized this by now and is forcing Gura to stream more to attract new viewers.