I'm replying to the poster, not to the article.
My point is that if you take the "free market" idea to its ultimate expression, then it's just about money. If the market demands a liberal viewpoint, then as a good businesswoman it makes perfect sense for Arianna to ignore whatever personal political views she has and supply what's being demanded. It even makes sense to switch the viewpoint back and forth repeatedly depending on what pays more at each point in time.
So why is it that the grandparent is complaining about it? It's perfectly in line with the free market philosophy.