I know it was a joke, but apparently a high amount of dislikes is good in the YouTube algorithm. Or at least indistinguishable to a "like". So Sasaki was right to not really care if she got a lot of dislikes. As long as her viewers were engaging with her channel she benefits from it.
Viewers having a very unique and wholesome moment with the virtual youtuber. The likes going up and down in real time. Everyone having laughs. Meanwhile some crazy person screaming for donations on another parallel world.