Comment by IMTDb

You are comparing apple to oranges. Social media posts are static, don’t watch you etc. But the distribution platform does all these things.

In books it’s exactly the same thing: do not believe for one second that the publishing industry does not watch engagement metrics (aka: sales) and does not adapt to the taste of the market. It’s also tuned to maximize outrage; see how popular unauthorized biographies of polarizing figures have become - who is next on Walter Isaacson list ? I am betting Trump must be somewhere there and it’s gonna be a banger.