This is insane. Show me one conservative-leaning media startup that was saved (or turned profitable!) through "deregulation and tax cuts" without reliance on other streams of revenue.
Unless you somehow mean that a better, faster-growing economy via deregulation and tax cuts results in better business outcomes overall, regardless of political leanings, which I would agree with enthusiastically.
How about two:
Notice the complete lack of advertising. It's unlikely that either of these two has much of a revenue stream beyond being funded by the Koch brothers. But Koch industries has made billions being one of the largest polluters in the world. Relaxing EPA guidelines on pollution is a huge business for them. So there's no need for either of those two media outlets to ever make a dime on its own, it just has to provide assistance for Republican politicians who are friendly to their environmental agenda.