Alex Massie calls her the "most effective political troll of our time":
[A]ssuming that celebrity is now an important part of Palin Inc, running carries a risk too. What if she loses? (When she loses, that is.) Defeated primary candidates are washed-up every four years and most of them are almost never heard from again. Palin may belong in a different category but her appeal, to some extent at least, rests on the myth that she and all she stands for were betrayed by John McCain and his dastardly advisors.
The Dish 