Ann Coulter has always been a SHILL. She does what she does to be controversial to sell books. What made her flip this time is that the Left was saying Trump listened to her and that tanked her book sales. She doesn't want to be seen as in Trump's pocket. She has to be controversial so she's now talking down about Trump for her next book. She isn't backing Mitt for President 2020. She only backs herself to build a base for herself. That's the name of the game and where the easy money is.
I think she's earning money from the left because she's talking Trump down now. She's taken money from the tea party, the right and now the left.