No. They should disclose their biases though. It's a business. Why would you sell something that no one is buying?

If I started a news site, I would target the audience with bigger pockets and more comfortable with subscribing to online services (many people are resistant). That would be people living in expensive cities.

Even if you are a non-profit, you are still beholden to your donators. Mozilla can't go ape shit on Google.