I just watched this last night. A lot of the content will already be well known to the HN audience. There was one big light-bulb moment for me. One of the speakers was clarifying the "If you're not paying then you are the product" idea. He refined it to, (rough quote), "Changes to your behavior and actions are the product" That distinction made the insidiousness much more clear than the former statement.
To be honest, "Even if you're paying you are the product too".[0,1]
[0] https://time.com/5596033/lawsuit-apple-selling-itunes-listen...
[1] https://www.washingtonpost.com/technology/2019/05/28/its-mid...