Yes...tis true Palin is no longer on Fox's payroll. She is now free to roam the country expostulating silliness with her particular brand of word salad.
Initially reported in Real Clear Politics, it has long been known that Palin was on the outs with Roger Ailes.
From Huffpost--
The news is not very surprising, but it does highlight, as much as anything, Palin's diminished relevance. Reports about the increasingly icy relationship between Palin and Fox News CEO Roger Ailes have been circulating for years. He has mocked her in public, and is said to have privately labeled her "stupid."