suisei turned off her superchat 'nough said.
When you get big enough, superchat/donations is just a tool to interact with the viewers. Merch & sponsorship is where the money is at.
You are heavily underestimating how much streamers earn though merch, a guy with 10k ccv can earn $millions per merch drop, albeit hololive streamer probs earned a bit less due to international shipping and merch taking years to arrive which can deter foreign buyers, that being said the amount of
simping fan devotion they have can probs offset it.
That $millions dollar per merch drop figure came from a
male twitch streamer btw.
Someone like marine probs put 100% of her superchat earning for projects money, but the SC money probs doesn't even cover a fraction of it with how much money she spent on them.