I think it's all related to the sell-side of adtech, publisher revenues have been going down for years while Google keeps on growing, with AMP and Google News a

I think it's all related to the sell-side of adtech, publisher revenues have been going down for years while Google keeps on growing, with AMP and Google News as weapons to keep revenue hostage from publishers. Added to that the permanent threat of SEO de-ranking (as the Daily Mail complained about recently), the relationship between publishers and Google is fragile.