I assume it is because the show is too popular. Amazon makes more from show viewers than they lose to upset Trump fans.

Also, they have started a spin-off series, Neagle. Maybe it is a ploy to reduce the role of Ritchson in the franchise, though I assume it is to reduce the royalties they pay to the book author. I noticed that the opening credits to Neagle do not mention the author, probably because it is not based on any of the books, just a character from the book universe.