Alan Jacobs has some doubts that everyone could make a living like CK:
It would be really gratifying if this model (not unlike the one Cory Doctorow has been using for a few years now in the book trade) works for a lot of people; but I have a suspicion that it will work best for artists and entertainers who have the ability to generate a distinctive aura of shared trust with their audiences. And not everyone has that, even artists and entertainers who are extremely popular.
The Dish 