Comment by Lerc

I do apply the rule universally, they haven't gone out of business.

If they were unable to gain any revenue from advertising, they would go out of business if they could not find an alternative source of income.

I feel that they are more likely to find an alternative than go out of business. That alternative might not motivate people to make content that no-one wants and trick viewers into watching. If it were a system where the users being happy dictated their income perhaps the service might be better than a system where the happiness of advertisers defines how much they get