>>12301657I'll break it down autistically. People enjoy the stream. It makes them feel good. It's an evolutionarily beneficial instinct to reciprocate when someone does something that makes you feel good, because the instinct is such that if you do so, they have more incentive to make you feel good in the future. It might not be logical, but the instinct exists. Which means that some people feel happier when they give money, which also implies that they feel sadder than they should be if they don't. These people want to maximize their happiness, therefore they give money.
If they give suggestions to nudge the streamer towards a game or a way to conduct the stream, it might also improve their stream experience in the future, because at least it puts the idea into the streamers' heads when they read the SC, and may also put the idea into chat's heads for them to regurgitate down the line and influence the streamer to cate to their specific tastes.
You may want people on this board to not feel happy by giving their money away, either because you believe the money would make them happier if it was spent in anorther way, or because you have a delusional fantasy that if this viewpoint is pushed far enough, vtubers will receive not enough money and die out. The former is a totally fine viewpoint but I somehow doubt that people on this board really give a shit about other anons. The latter will not happen. The most likely thing that will happen instead is that they will pander more towards the people who are still giving them money, which will likely be people you hate.