A lot of classic SEO content also makes great AI fodder. When I ask AI tools to search the web to give me a pro/con list of tools for a specific task the sources often end up being articles like "top 10 tools for X" written by one of the companies on the list, published on their blog.
Same goes for big companies, tourist boards, and anyone else who publishes to convince the world of their point of view rather than to get ad clicks