It doesn't need to be that dislikes are embarrassing to their pet causes. There were a few instances where business partners would, e.g., post an ad campaign th

It doesn't need to be that dislikes are embarrassing to their pet causes. There were a few instances where business partners would, e.g., post an ad campaign that got so many dislikes the dislike ratio entered the news cycle. I'm sure google gets pressure from their business/ad partners when that goes down.