I didn't say monopoly. I'm pointing out that if you're goal is a competitive market helped by subsidies, it doesn't make sense to give subsidies to the market leader.That is a feee market for ya. That is not considered a monopoly because there are other companies and not just the one option. You can’t punish one company in a fair market because they have the most popular cars, especially since this is obviously personal in nature.
And yes you can punish companies based on success, that's how the tax code works. New businesses, smaller businesses, they are frequently tax advantaged over bigger businesses.