To a lot of people unaware of Niji before the flames started, they were completely shocked that one of the big 2 giants in the industry was so awful, so now they expect all the other corpos to be like it. So now there's a wave of Nijisisters trying to feast on the flames to get revenge on people shit talking Niji or to have those flames cover up whatever Niji is doing right now. Then there's a wave of tourists like False's audience that hardly engage with the medium but think there's drama everywhere for them to pounce on. Then there's the twitch watchers who think all corpos are inherently corrupt and NijiEN imploding justified their lunacy, so they're dying for more corpo deaths.
There's just a bunch of people desperate for blood, especially Holo's blood. The Nijisisters want Holo blood for obvious reasons and they think if Holo is revealed as being bad, it makes Nijisanji look better. The tourists want Holo blood because its the other big corpo and the idea that the "darling of the industry" having dirt is pure crack to them. For the anti-corpo twitch watchers, Holo blood is the justification they are begging for to scream from the rooftops "THERE IS NO GOOD CORPOS, THEY'RE ALL BAD!".