Most Holo girls are completely mediocre entertainers: poor half-assed idols, not very funny outside clipped soundbites, boring snoozefest with cute noises for anyone not interested in CGDCT. So they rely on their gachikois for their living. They're not nearly interesting enough not to do that. Their viewers don't really overlap with Stars' viewers much. No idolpigs, no unicornfags, no meme noise clipwatching redditors with attention span of a goldfish.